78611475 has 24 divisors (see below), whose sum is σ = 131442480. Its totient is φ = 41451520.

The previous prime is 78611461. The next prime is 78611479. The reversal of 78611475 is 57411687.

It is not a de Polignac number, because 78611475 - 2⁴ = 78611459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78611479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 787 + ... + 12563.

It is an arithmetic number, because the mean of its divisors is an integer number (5476770).

Almost surely, 2^78611475 is an apocalyptic number.

78611475 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78611475 is a deficient number, since it is larger than the sum of its proper divisors (52831005).

78611475 is a wasteful number, since it uses less digits than its factorization.

78611475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11879 (or 11874 counting only the distinct ones).

The product of its digits is 47040, while the sum is 39.

The square root of 78611475 is about 8866.3112397434. The cubic root of 78611475 is about 428.3794691920.

The spelling of 78611475 in words is "seventy-eight million, six hundred eleven thousand, four hundred seventy-five".