78145808138530 has 64 divisors (see below), whose sum is σ = 160759623822336. Its totient is φ = 27072859000000.

The previous prime is 78145808138527. The next prime is 78145808138537. The reversal of 78145808138530 is 3583180854187.

It is a happy number.

It is a super-2 number, since 2×78145808138530² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78145808138537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60894196 + ... + 62164255.

It is an arithmetic number, because the mean of its divisors is an integer number (2511869122224).

Almost surely, 2^{78145808138530} is an apocalyptic number.

78145808138530 is an abundant number, since it is smaller than the sum of its proper divisors (82613815683806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78145808138530 is a wasteful number, since it uses less digits than its factorization.

78145808138530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123058743.

The product of its (nonzero) digits is 25804800, while the sum is 61.

The spelling of 78145808138530 in words is "seventy-eight trillion, one hundred forty-five billion, eight hundred eight million, one hundred thirty-eight thousand, five hundred thirty".