645266312436 has 24 divisors (see below), whose sum is σ = 1594187360640. Its totient is φ = 202436490112.

The previous prime is 645266312429. The next prime is 645266312461. The reversal of 645266312436 is 634213662546.

It is a super-2 number, since 2×645266312436² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581534876 + ... + 1581535283.

It is an arithmetic number, because the mean of its divisors is an integer number (66424473360).

Almost surely, 2^645266312436 is an apocalyptic number.

It is an amenable number.

645266312436 is an abundant number, since it is smaller than the sum of its proper divisors (948921048204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645266312436 is a wasteful number, since it uses less digits than its factorization.

645266312436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3163070183 (or 3163070181 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 48.

The spelling of 645266312436 in words is "six hundred forty-five billion, two hundred sixty-six million, three hundred twelve thousand, four hundred thirty-six".