78112501582 has 4 divisors (see below), whose sum is σ = 117168752376. Its totient is φ = 39056250790.

The previous prime is 78112501559. The next prime is 78112501589. The reversal of 78112501582 is 28510521187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28510521187 = 499 ⋅57135313.

It is a super-2 number, since 2×78112501582² (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 (78112501589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19528125394 + ... + 19528125397.

It is an arithmetic number, because the mean of its divisors is an integer number (29292188094).

Almost surely, 2^78112501582 is an apocalyptic number.

78112501582 is a deficient number, since it is larger than the sum of its proper divisors (39056250794).

78112501582 is a wasteful number, since it uses less digits than its factorization.

78112501582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39056250793.

The product of its (nonzero) digits is 44800, while the sum is 40.

The spelling of 78112501582 in words is "seventy-eight billion, one hundred twelve million, five hundred one thousand, five hundred eighty-two".