61612572 has 48 divisors (see below), whose sum is σ = 165779712. Its totient is φ = 17445120.

The previous prime is 61612547. The next prime is 61612591. The reversal of 61612572 is 27521616.

It is a super-2 number, since 2×61612572² = 7592218056910368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6247 + ... + 12737.

It is an arithmetic number, because the mean of its divisors is an integer number (3453744).

Almost surely, 2^61612572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61612572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82889856).

61612572 is an abundant number, since it is smaller than the sum of its proper divisors (104167140).

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

61612572 is a wasteful number, since it uses less digits than its factorization.

61612572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6618 (or 6616 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 61612572 is about 7849.3676178403. The cubic root of 61612572 is about 394.9630302418.

The spelling of 61612572 in words is "sixty-one million, six hundred twelve thousand, five hundred seventy-two".