78397155683 has 32 divisors (see below), whose sum is σ = 99875801088. Its totient is φ = 59756428800.

The previous prime is 78397155677. The next prime is 78397155751. The reversal of 78397155683 is 38655179387.

It is a cyclic number.

It is not a de Polignac number, because 78397155683 - 2⁶ = 78397155619 is a prime.

It is a super-2 number, since 2×78397155683² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78397155623) 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, 8250191 + ... + 8259687.

It is an arithmetic number, because the mean of its divisors is an integer number (3121118784).

Almost surely, 2^78397155683 is an apocalyptic number.

78397155683 is a deficient number, since it is larger than the sum of its proper divisors (21478645405).

78397155683 is a wasteful number, since it uses less digits than its factorization.

78397155683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11843.

The product of its digits is 38102400, while the sum is 62.

The spelling of 78397155683 in words is "seventy-eight billion, three hundred ninety-seven million, one hundred fifty-five thousand, six hundred eighty-three".