78257734365 has 16 divisors (see below), whose sum is σ = 126382586688. Its totient is φ = 41347387776.

The previous prime is 78257734339. The next prime is 78257734369. The reversal of 78257734365 is 56343775287.

It is not a de Polignac number, because 78257734365 - 2¹¹ = 78257732317 is a prime.

It is a super-2 number, since 2×78257734365² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78257734369) 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, 24377752 + ... + 24380961.

It is an arithmetic number, because the mean of its divisors is an integer number (7898911668).

Almost surely, 2^78257734365 is an apocalyptic number.

It is an amenable number.

78257734365 is a deficient number, since it is larger than the sum of its proper divisors (48124852323).

78257734365 is a wasteful number, since it uses less digits than its factorization.

78257734365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48758828.

The product of its digits is 29635200, while the sum is 57.

The spelling of 78257734365 in words is "seventy-eight billion, two hundred fifty-seven million, seven hundred thirty-four thousand, three hundred sixty-five".