61720928801 has 8 divisors (see below), whose sum is σ = 71045674560. Its totient is φ = 52523050608.

The previous prime is 61720928771. The next prime is 61720928813. The reversal of 61720928801 is 10882902716.

61720928801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61720928801 - 2³⁴ = 44541059617 is a prime.

It is a super-2 number, since 2×61720928801² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61720928821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31715846 + ... + 31717791.

It is an arithmetic number, because the mean of its divisors is an integer number (8880709320).

Almost surely, 2^61720928801 is an apocalyptic number.

It is an amenable number.

61720928801 is a deficient number, since it is larger than the sum of its proper divisors (9324745759).

61720928801 is a wasteful number, since it uses less digits than its factorization.

61720928801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63433783.

The product of its (nonzero) digits is 96768, while the sum is 44.

The spelling of 61720928801 in words is "sixty-one billion, seven hundred twenty million, nine hundred twenty-eight thousand, eight hundred one".