78160121530 has 16 divisors (see below), whose sum is σ = 141501448584. Its totient is φ = 31083330880.

The previous prime is 78160121521. The next prime is 78160121563. The reversal of 78160121530 is 3512106187.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 61421195889 + 16738925641 = 247833^2 + 129379^2 .

It is a super-2 number, since 2×78160121530² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22587901 + ... + 22591360.

Almost surely, 2^78160121530 is an apocalyptic number.

78160121530 is a deficient number, since it is larger than the sum of its proper divisors (63341327054).

78160121530 is a wasteful number, since it uses less digits than its factorization.

78160121530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45179441.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 78160121530 in words is "seventy-eight billion, one hundred sixty million, one hundred twenty-one thousand, five hundred thirty".