78053737531 has 144 divisors (see below), whose sum is σ = 109881408000. Its totient is φ = 55219903200.

The previous prime is 78053737511. The next prime is 78053737547. The reversal of 78053737531 is 13573735087.

It is not a de Polignac number, because 78053737531 - 2¹³ = 78053729339 is a prime.

It is a super-2 number, since 2×78053737531² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (78053737511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 757803226 + ... + 757803328.

Almost surely, 2^78053737531 is an apocalyptic number.

78053737531 is a deficient number, since it is larger than the sum of its proper divisors (31827670469).

78053737531 is a wasteful number, since it uses less digits than its factorization.

78053737531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 1852200, while the sum is 49.

The spelling of 78053737531 in words is "seventy-eight billion, fifty-three million, seven hundred thirty-seven thousand, five hundred thirty-one".