61713120 has 96 divisors (see below), whose sum is σ = 222179328. Its totient is φ = 14105088.

The previous prime is 61713061. The next prime is 61713191. The reversal of 61713120 is 2131716.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5824 + ... + 12543.

It is an arithmetic number, because the mean of its divisors is an integer number (2314368).

Almost surely, 2^61713120 is an apocalyptic number.

61713120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61713120 is an abundant number, since it is smaller than the sum of its proper divisors (160466208).

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

61713120 is a wasteful number, since it uses less digits than its factorization.

61713120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18392 (or 18384 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 61713120 is about 7855.7698540627. The cubic root of 61713120 is about 395.1777654174.

Adding to 61713120 its reverse (2131716), we get a palindrome (63844836).

The spelling of 61713120 in words is "sixty-one million, seven hundred thirteen thousand, one hundred twenty".