61809243132 has 48 divisors (see below), whose sum is σ = 177503470592. Its totient is φ = 16301338560.

The previous prime is 61809243101. The next prime is 61809243149. The reversal of 61809243132 is 23134290816.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 28299844 + ... + 28302027.

Almost surely, 2^61809243132 is an apocalyptic number.

It is an amenable number.

61809243132 is an abundant number, since it is smaller than the sum of its proper divisors (115694227460).

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

61809243132 is a wasteful number, since it uses less digits than its factorization.

61809243132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56601898 (or 56601896 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 61809243132 in words is "sixty-one billion, eight hundred nine million, two hundred forty-three thousand, one hundred thirty-two".