61432564 has 6 divisors (see below), whose sum is σ = 107506994. Its totient is φ = 30716280.

The previous prime is 61432561. The next prime is 61432573. The reversal of 61432564 is 46523416.

It can be written as a sum of positive squares in only one way, i.e., 56370064 + 5062500 = 7508^2 + 2250^2 .

It is a super-2 number, since 2×61432564² = 7547919839228192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61432561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7679067 + ... + 7679074.

Almost surely, 2^61432564 is an apocalyptic number.

It is an amenable number.

61432564 is a deficient number, since it is larger than the sum of its proper divisors (46074430).

61432564 is a wasteful number, since it uses less digits than its factorization.

61432564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15358145 (or 15358143 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 61432564 is about 7837.8928290708. The cubic root of 61432564 is about 394.5780121942.

The spelling of 61432564 in words is "sixty-one million, four hundred thirty-two thousand, five hundred sixty-four".