78537794237 has 24 divisors (see below), whose sum is σ = 92074694016. Its totient is φ = 65622960000.

The previous prime is 78537794213. The next prime is 78537794263. The reversal of 78537794237 is 73249773587.

It is a happy number.

It is not a de Polignac number, because 78537794237 - 2¹⁴ = 78537777853 is a prime.

It is a super-2 number, since 2×78537794237² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78537794237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78537794207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22367312 + ... + 22370822.

It is an arithmetic number, because the mean of its divisors is an integer number (3836445584).

Almost surely, 2^78537794237 is an apocalyptic number.

It is an amenable number.

78537794237 is a deficient number, since it is larger than the sum of its proper divisors (13536899779).

78537794237 is a wasteful number, since it uses less digits than its factorization.

78537794237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5501 (or 5460 counting only the distinct ones).

The product of its digits is 62233920, while the sum is 62.

The spelling of 78537794237 in words is "seventy-eight billion, five hundred thirty-seven million, seven hundred ninety-four thousand, two hundred thirty-seven".