6436191240 has 96 divisors (see below), whose sum is σ = 21113239680. Its totient is φ = 1700267136.

The previous prime is 6436191221. The next prime is 6436191247. The reversal of 6436191240 is 421916346.

6436191240 is a `hidden beast` number, since 643 + 6 + 1 + 9 + 1 + 2 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6436191195 and 6436191204.

It is not an unprimeable number, because it can be changed into a prime (6436191247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45024 + ... + 122063.

It is an arithmetic number, because the mean of its divisors is an integer number (219929580).

Almost surely, 2^6436191240 is an apocalyptic number.

6436191240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6436191240 is an abundant number, since it is smaller than the sum of its proper divisors (14677048440).

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

6436191240 is a wasteful number, since it uses less digits than its factorization.

6436191240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167211 (or 167204 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6436191240 is about 80225.8763741475. The cubic root of 6436191240 is about 1860.1286418137.

The spelling of 6436191240 in words is "six billion, four hundred thirty-six million, one hundred ninety-one thousand, two hundred forty".