7958640621001 has 16 divisors (see below), whose sum is σ = 9510864076800. Its totient is φ = 6511474263888.

The previous prime is 7958640620963. The next prime is 7958640621011. The reversal of 7958640621001 is 1001260468597.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7958640621001 - 2²⁹ = 7958103750089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7958640621011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51522621 + ... + 51676858.

It is an arithmetic number, because the mean of its divisors is an integer number (594429004800).

Almost surely, 2^{7958640621001} is an apocalyptic number.

It is an amenable number.

7958640621001 is a deficient number, since it is larger than the sum of its proper divisors (1552223455799).

7958640621001 is a wasteful number, since it uses less digits than its factorization.

7958640621001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103199988.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 7958640621001 in words is "seven trillion, nine hundred fifty-eight billion, six hundred forty million, six hundred twenty-one thousand, one".