78115690462 has 4 divisors (see below), whose sum is σ = 117173535696. Its totient is φ = 39057845230.

The previous prime is 78115690453. The next prime is 78115690481. The reversal of 78115690462 is 26409651187.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26409651187 = 7919 ⋅3334973.

It is a super-2 number, since 2×78115690462² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 19528922614 + ... + 19528922617.

It is an arithmetic number, because the mean of its divisors is an integer number (29293383924).

Almost surely, 2^78115690462 is an apocalyptic number.

78115690462 is a deficient number, since it is larger than the sum of its proper divisors (39057845234).

78115690462 is a wasteful number, since it uses less digits than its factorization.

78115690462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39057845233.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 78115690462 in words is "seventy-eight billion, one hundred fifteen million, six hundred ninety thousand, four hundred sixty-two".