642151260306536 has 16 divisors (see below), whose sum is σ = 1208509574465700. Its totient is φ = 319882040449024.

The previous prime is 642151260306503. The next prime is 642151260306553. The reversal of 642151260306536 is 635603062151246.

It can be written as a sum of positive squares in 2 ways, for example, as 630597175549636 + 11554084756900 = 25111694^2 + 3399130^2 .

It is a super-2 number, since 2×642151260306536² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149198710745 + ... + 149198715048.

Almost surely, 2^{642151260306536} is an apocalyptic number.

It is an amenable number.

642151260306536 is a deficient number, since it is larger than the sum of its proper divisors (566358314159164).

642151260306536 is a wasteful number, since it uses less digits than its factorization.

642151260306536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298397426068 (or 298397426064 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 642151260306536 in words is "six hundred forty-two trillion, one hundred fifty-one billion, two hundred sixty million, three hundred six thousand, five hundred thirty-six".