78737009645 has 32 divisors (see below), whose sum is σ = 108709032960. Its totient is φ = 53628825600.

The previous prime is 78737009609. The next prime is 78737009699. The reversal of 78737009645 is 54690073787.

It is not a de Polignac number, because 78737009645 - 2¹⁴ = 78736993261 is a prime.

It is a super-3 number, since 3×78737009645³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3342629 + ... + 3366101.

It is an arithmetic number, because the mean of its divisors is an integer number (3397157280).

Almost surely, 2^78737009645 is an apocalyptic number.

It is an amenable number.

78737009645 is a deficient number, since it is larger than the sum of its proper divisors (29972023315).

78737009645 is a wasteful number, since it uses less digits than its factorization.

78737009645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24125.

The product of its (nonzero) digits is 8890560, while the sum is 56.

The spelling of 78737009645 in words is "seventy-eight billion, seven hundred thirty-seven million, nine thousand, six hundred forty-five".