645956929941 has 8 divisors (see below), whose sum is σ = 867056282400. Its totient is φ = 427747765392.

The previous prime is 645956929931. The next prime is 645956929967. The reversal of 645956929941 is 149929659546.

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

It is a de Polignac number, because none of the positive numbers 2^k-645956929941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645956929931) 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, 722546455 + ... + 722547348.

It is an arithmetic number, because the mean of its divisors is an integer number (108382035300).

Almost surely, 2^645956929941 is an apocalyptic number.

It is an amenable number.

645956929941 is a deficient number, since it is larger than the sum of its proper divisors (221099352459).

645956929941 is a wasteful number, since it uses less digits than its factorization.

645956929941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445093955.

The product of its digits is 188956800, while the sum is 69.

The spelling of 645956929941 in words is "six hundred forty-five billion, nine hundred fifty-six million, nine hundred twenty-nine thousand, nine hundred forty-one".