61642903188 has 24 divisors (see below), whose sum is σ = 148473230080. Its totient is φ = 19884807360.

The previous prime is 61642903169. The next prime is 61642903199. The reversal of 61642903188 is 88130924616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82852993 + ... + 82853736.

Almost surely, 2^61642903188 is an apocalyptic number.

It is an amenable number.

61642903188 is an abundant number, since it is smaller than the sum of its proper divisors (86830326892).

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

61642903188 is a wasteful number, since it uses less digits than its factorization.

61642903188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165706767 (or 165706765 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 61642903188 in words is "sixty-one billion, six hundred forty-two million, nine hundred three thousand, one hundred eighty-eight".