78356072919 has 16 divisors (see below), whose sum is σ = 105166205568. Its totient is φ = 51891826272.

The previous prime is 78356072887. The next prime is 78356072923. The reversal of 78356072919 is 91927065387.

It is not a de Polignac number, because 78356072919 - 2⁵ = 78356072887 is a prime.

It is a super-2 number, since 2×78356072919² (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 (78356072959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2123344 + ... + 2159930.

It is an arithmetic number, because the mean of its divisors is an integer number (6572887848).

Almost surely, 2^78356072919 is an apocalyptic number.

78356072919 is a deficient number, since it is larger than the sum of its proper divisors (26810132649).

78356072919 is a wasteful number, since it uses less digits than its factorization.

78356072919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41294.

The product of its (nonzero) digits is 5715360, while the sum is 57.

The spelling of 78356072919 in words is "seventy-eight billion, three hundred fifty-six million, seventy-two thousand, nine hundred nineteen".