61620544 has 28 divisors (see below), whose sum is σ = 124358400. Its totient is φ = 30286208.

The previous prime is 61620539. The next prime is 61620547. The reversal of 61620544 is 44502616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61620547) 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, 4384 + ... + 11935.

Almost surely, 2^61620544 is an apocalyptic number.

61620544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61620544 is an abundant number, since it is smaller than the sum of its proper divisors (62737856).

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

61620544 is a wasteful number, since it uses less digits than its factorization.

61620544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16390 (or 16380 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 61620544 is about 7849.8754130241. The cubic root of 61620544 is about 394.9800641543.

The spelling of 61620544 in words is "sixty-one million, six hundred twenty thousand, five hundred forty-four".