61572630 has 64 divisors (see below), whose sum is σ = 170615808. Its totient is φ = 13929600.

The previous prime is 61572629. The next prime is 61572647. The reversal of 61572630 is 3627516.

61572630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19759 + ... + 22661.

It is an arithmetic number, because the mean of its divisors is an integer number (2665872).

Almost surely, 2^61572630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61572630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85307904).

61572630 is an abundant number, since it is smaller than the sum of its proper divisors (109043178).

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

61572630 is a wasteful number, since it uses less digits than its factorization.

61572630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 61572630 is about 7846.8229239610. The cubic root of 61572630 is about 394.8776633377.

The spelling of 61572630 in words is "sixty-one million, five hundred seventy-two thousand, six hundred thirty".