45507097978 has 8 divisors (see below), whose sum is σ = 68283401940. Its totient is φ = 22745964000.

The previous prime is 45507097973. The next prime is 45507098069. The reversal of 45507097978 is 87979070554.

It can be written as a sum of positive squares in 2 ways, for example, as 45410331409 + 96766569 = 213097^2 + 9837^2 .

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

It is not an unprimeable number, because it can be changed into a prime (45507097973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3784993 + ... + 3796996.

Almost surely, 2^45507097978 is an apocalyptic number.

45507097978 is a deficient number, since it is larger than the sum of its proper divisors (22776303962).

45507097978 is a wasteful number, since it uses less digits than its factorization.

45507097978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7584992.

The product of its (nonzero) digits is 22226400, while the sum is 61.

The spelling of 45507097978 in words is "forty-five billion, five hundred seven million, ninety-seven thousand, nine hundred seventy-eight".