45191751920 has 80 divisors (see below), whose sum is σ = 121873294848. Its totient is φ = 15263043840.

The previous prime is 45191751911. The next prime is 45191751949. The reversal of 45191751920 is 2915719154.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 564716 + ... + 639755.

Almost surely, 2^45191751920 is an apocalyptic number.

45191751920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45191751920 is an abundant number, since it is smaller than the sum of its proper divisors (76681542928).

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

45191751920 is a wasteful number, since it uses less digits than its factorization.

45191751920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204558 (or 1204552 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 44.

The spelling of 45191751920 in words is "forty-five billion, one hundred ninety-one million, seven hundred fifty-one thousand, nine hundred twenty".