641238999076 has 81 divisors (see below), whose sum is σ = 1283240729043. Its totient is φ = 280206838080.

The previous prime is 641238999053. The next prime is 641238999103. The reversal of 641238999076 is 670999832146.

The square root of 641238999076 is 800774.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7342776100 + 633896222976 = 85690^2 + 796176^2 .

It is a super-2 number, since 2×641238999076² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641238998999 and 641238999017.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 395581546 + ... + 395583166.

Almost surely, 2^641238999076 is an apocalyptic number.

641238999076 is the 800774-th square number.

It is an amenable number.

641238999076 is an abundant number, since it is smaller than the sum of its proper divisors (642001729967).

641238999076 is a wasteful number, since it uses less digits than its factorization.

641238999076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3310 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 64.

Multiplying 641238999076 by its sum of digits (64), we get a square (41039295940864 = 6406192²).

The spelling of 641238999076 in words is "six hundred forty-one billion, two hundred thirty-eight million, nine hundred ninety-nine thousand, seventy-six".