53661560 has 16 divisors (see below), whose sum is σ = 120738600. Its totient is φ = 21464608.

The previous prime is 53661547. The next prime is 53661583. The reversal of 53661560 is 6516635.

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, 670730 + ... + 670809.

Almost surely, 2^53661560 is an apocalyptic number.

It is an amenable number.

53661560 is an abundant number, since it is smaller than the sum of its proper divisors (67077040).

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

53661560 is a wasteful number, since it uses less digits than its factorization.

53661560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341550 (or 1341546 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 53661560 is about 7325.4051082517. The cubic root of 53661560 is about 377.1850156750.

The spelling of 53661560 in words is "fifty-three million, six hundred sixty-one thousand, five hundred sixty".