61003672520 has 128 divisors (see below), whose sum is σ = 158103187200. Its totient is φ = 20751360000.

The previous prime is 61003672511. The next prime is 61003672523. The reversal of 61003672520 is 2527630016.

It is not an unprimeable number, because it can be changed into a prime (61003672523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19747136 + ... + 19750224.

It is an arithmetic number, because the mean of its divisors is an integer number (1235181150).

Almost surely, 2^61003672520 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 61003672520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79051593600).

61003672520 is an abundant number, since it is smaller than the sum of its proper divisors (97099514680).

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

61003672520 is a wasteful number, since it uses less digits than its factorization.

61003672520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639 (or 3635 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 61003672520 in words is "sixty-one billion, three million, six hundred seventy-two thousand, five hundred twenty".