76578945 has 16 divisors (see below), whose sum is σ = 123057792. Its totient is φ = 40664960.

The previous prime is 76578919. The next prime is 76578947. The reversal of 76578945 is 54987567.

It is not a de Polignac number, because 76578945 - 2⁹ = 76578433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76578947) 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, 7461 + ... + 14450.

It is an arithmetic number, because the mean of its divisors is an integer number (7691112).

Almost surely, 2^76578945 is an apocalyptic number.

It is an amenable number.

76578945 is a deficient number, since it is larger than the sum of its proper divisors (46478847).

76578945 is a wasteful number, since it uses less digits than its factorization.

76578945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22152.

The product of its digits is 2116800, while the sum is 51.

The square root of 76578945 is about 8750.9396638304. The cubic root of 76578945 is about 424.6552128652.

The spelling of 76578945 in words is "seventy-six million, five hundred seventy-eight thousand, nine hundred forty-five".