61557360 has 40 divisors (see below), whose sum is σ = 190828560. Its totient is φ = 16415232.

The previous prime is 61557341. The next prime is 61557383. The reversal of 61557360 is 6375516.

61557360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128005 + ... + 128484.

It is an arithmetic number, because the mean of its divisors is an integer number (4770714).

Almost surely, 2^61557360 is an apocalyptic number.

61557360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61557360 is an abundant number, since it is smaller than the sum of its proper divisors (129271200).

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

61557360 is a wasteful number, since it uses less digits than its factorization.

61557360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256505 (or 256499 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 61557360 is about 7845.8498583646. The cubic root of 61557360 is about 394.8450174449.

It can be divided in two parts, 615 and 57360, that added together give a palindrome (57975).

The spelling of 61557360 in words is "sixty-one million, five hundred fifty-seven thousand, three hundred sixty".