42980521256 has 8 divisors (see below), whose sum is σ = 80588477370. Its totient is φ = 21490260624.

The previous prime is 42980521253. The next prime is 42980521271. The reversal of 42980521256 is 65212508924.

It can be written as a sum of positive squares in only one way, i.e., 42226140100 + 754381156 = 205490^2 + 27466^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (42980521253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2686282571 + ... + 2686282586.

Almost surely, 2^42980521256 is an apocalyptic number.

It is an amenable number.

42980521256 is a deficient number, since it is larger than the sum of its proper divisors (37607956114).

42980521256 is a wasteful number, since it uses less digits than its factorization.

42980521256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372565163 (or 5372565159 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 42980521256 in words is "forty-two billion, nine hundred eighty million, five hundred twenty-one thousand, two hundred fifty-six".