78513271078 has 32 divisors (see below), whose sum is σ = 129304885248. Its totient is φ = 35458423200.

The previous prime is 78513271073. The next prime is 78513271097. The reversal of 78513271078 is 87017231587.

It is a super-2 number, since 2×78513271078² (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 (78513271073) 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, 2122683 + ... + 2159353.

It is an arithmetic number, because the mean of its divisors is an integer number (4040777664).

Almost surely, 2^78513271078 is an apocalyptic number.

78513271078 is a deficient number, since it is larger than the sum of its proper divisors (50791614170).

78513271078 is a wasteful number, since it uses less digits than its factorization.

78513271078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37308.

The product of its (nonzero) digits is 658560, while the sum is 49.

The spelling of 78513271078 in words is "seventy-eight billion, five hundred thirteen million, two hundred seventy-one thousand, seventy-eight".