45631978290 has 32 divisors (see below), whose sum is σ = 121685276160. Its totient is φ = 12168527472.

The previous prime is 45631978279. The next prime is 45631978333. The reversal of 45631978290 is 9287913654.

45631978290 is a `hidden beast` number, since 4 + 563 + 1 + 9 + 78 + 2 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84503394 + ... + 84503933.

It is an arithmetic number, because the mean of its divisors is an integer number (3802664880).

It is a 1-persistent number, because it is pandigital, but 2⋅45631978290 = 91263956580 is not.

Almost surely, 2^45631978290 is an apocalyptic number.

45631978290 is an abundant number, since it is smaller than the sum of its proper divisors (76053297870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45631978290 is a wasteful number, since it uses less digits than its factorization.

45631978290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169007343 (or 169007337 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 45631978290 in words is "forty-five billion, six hundred thirty-one million, nine hundred seventy-eight thousand, two hundred ninety".