61585099572 has 48 divisors (see below), whose sum is σ = 152171574912. Its totient is φ = 19318256640.

The previous prime is 61585099571. The next prime is 61585099633. The reversal of 61585099572 is 27599058516.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61585099571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2046072 + ... + 2075952.

It is an arithmetic number, because the mean of its divisors is an integer number (3170241144).

Almost surely, 2^61585099572 is an apocalyptic number.

It is an amenable number.

61585099572 is an abundant number, since it is smaller than the sum of its proper divisors (90586475340).

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

61585099572 is a wasteful number, since it uses less digits than its factorization.

61585099572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40008 (or 40006 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 57.

The spelling of 61585099572 in words is "sixty-one billion, five hundred eighty-five million, ninety-nine thousand, five hundred seventy-two".