45651540 has 72 divisors (see below), whose sum is σ = 139976928. Its totient is φ = 11024960.

The previous prime is 45651521. The next prime is 45651553. The reversal of 45651540 is 4515654.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 45651498 and 45651507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173449 + ... + 173711.

It is an arithmetic number, because the mean of its divisors is an integer number (1944124).

Almost surely, 2^45651540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45651540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69988464).

45651540 is an abundant number, since it is smaller than the sum of its proper divisors (94325388).

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

45651540 is a wasteful number, since it uses less digits than its factorization.

45651540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 45651540 is about 6756.5923363779. The cubic root of 45651540 is about 357.3977473387.

It can be divided in two parts, 4565 and 1540, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 45651540 in words is "forty-five million, six hundred fifty-one thousand, five hundred forty".