45678749978 has 16 divisors (see below), whose sum is σ = 68983114560. Its totient is φ = 22684428000.

The previous prime is 45678749899. The next prime is 45678749999. The reversal of 45678749978 is 87994787654.

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, 3550838 + ... + 3563678.

It is an arithmetic number, because the mean of its divisors is an integer number (4311444660).

Almost surely, 2^45678749978 is an apocalyptic number.

45678749978 is a deficient number, since it is larger than the sum of its proper divisors (23304364582).

45678749978 is a wasteful number, since it uses less digits than its factorization.

45678749978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24773.

The product of its digits is 853493760, while the sum is 74.

The spelling of 45678749978 in words is "forty-five billion, six hundred seventy-eight million, seven hundred forty-nine thousand, nine hundred seventy-eight".