61371556 has 9 divisors (see below), whose sum is σ = 107427649. Its totient is φ = 30677944.

The previous prime is 61371553. The next prime is 61371571. The reversal of 61371556 is 65517316.

The square root of 61371556 is 7834.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 49702500 + 11669056 = 7050^2 + 3416^2 .

It is a super-2 number, since 2×61371556² = 7532935771722272, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61371553) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13710 + ... + 17626.

Almost surely, 2^61371556 is an apocalyptic number.

61371556 is the 7834-th square number.

It is an amenable number.

61371556 is a deficient number, since it is larger than the sum of its proper divisors (46056093).

61371556 is an frugal number, since it uses more digits than its factorization.

61371556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7838 (or 3919 counting only the distinct ones).

The product of its digits is 18900, while the sum is 34.

The cubic root of 61371556 is about 394.4473519120.

Subtracting 61371556 from its reverse (65517316), we obtain a triangular number (4145760 = T₂₈₇₉).

The spelling of 61371556 in words is "sixty-one million, three hundred seventy-one thousand, five hundred fifty-six".