61472644 has 6 divisors (see below), whose sum is σ = 107577134. Its totient is φ = 30736320.

The previous prime is 61472627. The next prime is 61472669. The reversal of 61472644 is 44627416.

It can be written as a sum of positive squares in only one way, i.e., 60684100 + 788544 = 7790^2 + 888^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7684077 + ... + 7684084.

Almost surely, 2^61472644 is an apocalyptic number.

It is an amenable number.

61472644 is a deficient number, since it is larger than the sum of its proper divisors (46104490).

61472644 is a wasteful number, since it uses less digits than its factorization.

61472644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15368165 (or 15368163 counting only the distinct ones).

The product of its digits is 32256, while the sum is 34.

The square root of 61472644 is about 7840.4492218240. The cubic root of 61472644 is about 394.6638040916.

The spelling of 61472644 in words is "sixty-one million, four hundred seventy-two thousand, six hundred forty-four".