78427501115 has 8 divisors (see below), whose sum is σ = 94115342880. Its totient is φ = 62740439872.

The previous prime is 78427501109. The next prime is 78427501127. The reversal of 78427501115 is 51110572487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78427501115 - 2⁶ = 78427501051 is a prime.

It is a super-2 number, since 2×78427501115² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55106 + ... + 399864.

It is an arithmetic number, because the mean of its divisors is an integer number (11764417860).

Almost surely, 2^78427501115 is an apocalyptic number.

78427501115 is a deficient number, since it is larger than the sum of its proper divisors (15687841765).

78427501115 is a wasteful number, since it uses less digits than its factorization.

78427501115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390261.

The product of its (nonzero) digits is 78400, while the sum is 41.

The spelling of 78427501115 in words is "seventy-eight billion, four hundred twenty-seven million, five hundred one thousand, one hundred fifteen".