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6200061981 = 313211564487
BaseRepresentation
bin1011100011000110…
…10111000000011101
3121000002111210010020
411301203113000131
5100144203440411
62503120502353
7306433441311
oct56143270035
917002453106
106200061981
1126a1856373
12125047a9b9
1377a675339
1442b609b41
152644a5606
hex1718d701d

6200061981 has 8 divisors (see below), whose sum is σ = 8273012544. Its totient is φ = 4130243040.

The previous prime is 6200061979. The next prime is 6200061997. The reversal of 6200061981 is 1891600026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6200061981 - 21 = 6200061979 is a prime.

It is a super-2 number, since 2×62000619812 = 76881537136483288722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6200061971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778281 + ... + 786206.

It is an arithmetic number, because the mean of its divisors is an integer number (1034126568).

Almost surely, 26200061981 is an apocalyptic number.

It is an amenable number.

6200061981 is a deficient number, since it is larger than the sum of its proper divisors (2072950563).

6200061981 is a wasteful number, since it uses less digits than its factorization.

6200061981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565811.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 6200061981 is about 78740.4723188780. The cubic root of 6200061981 is about 1837.0966717524.

The spelling of 6200061981 in words is "six billion, two hundred million, sixty-one thousand, nine hundred eighty-one".

Divisors: 1 3 1321 3963 1564487 4693461 2066687327 6200061981