61620133168 has 40 divisors (see below), whose sum is σ = 130577513040. Its totient is φ = 27937117440.

The previous prime is 61620133151. The next prime is 61620133181. The reversal of 61620133168 is 86133102616.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381555 + ... + 518482.

It is an arithmetic number, because the mean of its divisors is an integer number (3264437826).

Almost surely, 2^61620133168 is an apocalyptic number.

It is an amenable number.

61620133168 is an abundant number, since it is smaller than the sum of its proper divisors (68957379872).

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

61620133168 is a wasteful number, since it uses less digits than its factorization.

61620133168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900445 (or 900439 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 61620133168 in words is "sixty-one billion, six hundred twenty million, one hundred thirty-three thousand, one hundred sixty-eight".