61404544 has 32 divisors (see below), whose sum is σ = 129529800. Its totient is φ = 28895232.

The previous prime is 61404487. The next prime is 61404569. The reversal of 61404544 is 44540416.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11934 + ... + 16285.

Almost surely, 2^61404544 is an apocalyptic number.

61404544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61404544 is an abundant number, since it is smaller than the sum of its proper divisors (68125256).

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

61404544 is a wasteful number, since it uses less digits than its factorization.

61404544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28250 (or 28238 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 61404544 is about 7836.1051549861. The cubic root of 61404544 is about 394.5180127599.

The spelling of 61404544 in words is "sixty-one million, four hundred four thousand, five hundred forty-four".