61916180 has 12 divisors (see below), whose sum is σ = 130024020. Its totient is φ = 24766464.

The previous prime is 61916177. The next prime is 61916201. The reversal of 61916180 is 8161916.

It can be written as a sum of positive squares in 2 ways, for example, as 34058896 + 27857284 = 5836^2 + 5278^2 .

It is a super-2 number, since 2×61916180² = 7667226691584800, which contains 22 as substring.

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, 1547885 + ... + 1547924.

It is an arithmetic number, because the mean of its divisors is an integer number (10835335).

Almost surely, 2^61916180 is an apocalyptic number.

It is an amenable number.

61916180 is an abundant number, since it is smaller than the sum of its proper divisors (68107840).

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

61916180 is a wasteful number, since it uses less digits than its factorization.

61916180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095818 (or 3095816 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 61916180 is about 7868.6834985276. The cubic root of 61916180 is about 395.6107200601.

The spelling of 61916180 in words is "sixty-one million, nine hundred sixteen thousand, one hundred eighty".