78097863571 has 16 divisors (see below), whose sum is σ = 96157057024. Its totient is φ = 61768181664.

The previous prime is 78097863559. The next prime is 78097863583. The reversal of 78097863571 is 17536879087.

It is an interprime number because it is at equal distance from previous prime (78097863559) and next prime (78097863583).

It is not a de Polignac number, because 78097863571 - 2²³ = 78089474963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78097863521) 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, 78766 + ... + 402988.

It is an arithmetic number, because the mean of its divisors is an integer number (6009816064).

Almost surely, 2^78097863571 is an apocalyptic number.

78097863571 is a deficient number, since it is larger than the sum of its proper divisors (18059193453).

78097863571 is a wasteful number, since it uses less digits than its factorization.

78097863571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326890.

The product of its (nonzero) digits is 17781120, while the sum is 61.

The spelling of 78097863571 in words is "seventy-eight billion, ninety-seven million, eight hundred sixty-three thousand, five hundred seventy-one".