61572644 has 24 divisors (see below), whose sum is σ = 125471808. Its totient is φ = 25889760.

The previous prime is 61572629. The next prime is 61572647. The reversal of 61572644 is 44627516.

It is not an unprimeable number, because it can be changed into a prime (61572647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19262 + ... + 22229.

It is an arithmetic number, because the mean of its divisors is an integer number (5227992).

Almost surely, 2^61572644 is an apocalyptic number.

It is an amenable number.

61572644 is an abundant number, since it is smaller than the sum of its proper divisors (63899164).

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

61572644 is a wasteful number, since it uses less digits than its factorization.

61572644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41555 (or 41553 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 61572644 is about 7846.8238160417. The cubic root of 61572644 is about 394.8776932660.

The spelling of 61572644 in words is "sixty-one million, five hundred seventy-two thousand, six hundred forty-four".