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6497388090 = 232572193201
BaseRepresentation
bin1100000110100011…
…00100011000111010
3121202210222111212100
412003101210120322
5101301312404330
62552421324230
7320003613264
oct60321443072
917683874770
106497388090
112834673926
121313b66676
137c714804b
14458cc4b34
15280637060
hex18346463a

6497388090 has 24 divisors (see below), whose sum is σ = 16893209268. Its totient is φ = 1732636800.

The previous prime is 6497388089. The next prime is 6497388091. The reversal of 6497388090 is 908837946.

It is an interprime number because it is at equal distance from previous prime (6497388089) and next prime (6497388091).

It can be written as a sum of positive squares in 2 ways, for example, as 5693155209 + 804232881 = 75453^2 + 28359^2 .

It is not an unprimeable number, because it can be changed into a prime (6497388091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36096511 + ... + 36096690.

Almost surely, 26497388090 is an apocalyptic number.

6497388090 is an abundant number, since it is smaller than the sum of its proper divisors (10395821178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6497388090 is a wasteful number, since it uses less digits than its factorization.

6497388090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72193214 (or 72193211 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 6497388090 is about 80606.3774772195. The cubic root of 6497388090 is about 1866.0055709900.

The spelling of 6497388090 in words is "six billion, four hundred ninety-seven million, three hundred eighty-eight thousand, ninety".

Divisors: 1 2 3 5 6 9 10 15 18 30 45 90 72193201 144386402 216579603 360966005 433159206 649738809 721932010 1082898015 1299477618 2165796030 3248694045 6497388090