72361544 has 8 divisors (see below), whose sum is σ = 135677910. Its totient is φ = 36180768.

The previous prime is 72361511. The next prime is 72361559. The reversal of 72361544 is 44516327.

It can be written as a sum of positive squares in only one way, i.e., 52736644 + 19624900 = 7262^2 + 4430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 72361544.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4522589 + ... + 4522604.

Almost surely, 2^72361544 is an apocalyptic number.

It is an amenable number.

72361544 is a deficient number, since it is larger than the sum of its proper divisors (63316366).

72361544 is a wasteful number, since it uses less digits than its factorization.

72361544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9045199 (or 9045195 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 72361544 is about 8506.5588812398. The cubic root of 72361544 is about 416.7119373390.

The spelling of 72361544 in words is "seventy-two million, three hundred sixty-one thousand, five hundred forty-four".