61520371230 has 32 divisors (see below), whose sum is σ = 147722456448. Its totient is φ = 16397258400.

The previous prime is 61520371189. The next prime is 61520371249. The reversal of 61520371230 is 3217302516.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449536 + ... + 570195.

It is an arithmetic number, because the mean of its divisors is an integer number (4616326764).

Almost surely, 2^61520371230 is an apocalyptic number.

61520371230 is an abundant number, since it is smaller than the sum of its proper divisors (86202085218).

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

61520371230 is a wasteful number, since it uses less digits than its factorization.

61520371230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021752.

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

Adding to 61520371230 its reverse (3217302516), we get a palindrome (64737673746).

The spelling of 61520371230 in words is "sixty-one billion, five hundred twenty million, three hundred seventy-one thousand, two hundred thirty".