78375506 has 16 divisors (see below), whose sum is σ = 128608128. Its totient is φ = 35526000.

The previous prime is 78375497. The next prime is 78375511. The reversal of 78375506 is 60557387.

It is a super-2 number, since 2×78375506² = 12285439881512072, which contains 22 as substring.

It is a Curzon number.

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, 3431 + ... + 12981.

It is an arithmetic number, because the mean of its divisors is an integer number (8038008).

Almost surely, 2^78375506 is an apocalyptic number.

78375506 is a deficient number, since it is larger than the sum of its proper divisors (50232622).

78375506 is a wasteful number, since it uses less digits than its factorization.

78375506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9937.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 78375506 is about 8852.9941827610. The cubic root of 78375506 is about 427.9504156900.

The spelling of 78375506 in words is "seventy-eight million, three hundred seventy-five thousand, five hundred six".