61682573640661 has 8 divisors (see below), whose sum is σ = 61796306561184. Its totient is φ = 61568907450960.

The previous prime is 61682573640643. The next prime is 61682573640683. The reversal of 61682573640661 is 16604637528616.

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

It is a cyclic number.

It is not a de Polignac number, because 61682573640661 - 2³⁵ = 61648213902293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61682573640661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61682573640601) 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, 14832115 + ... + 18529888.

It is an arithmetic number, because the mean of its divisors is an integer number (7724538320148).

Almost surely, 2^{61682573640661} is an apocalyptic number.

It is an amenable number.

61682573640661 is a deficient number, since it is larger than the sum of its proper divisors (113732920523).

61682573640661 is a wasteful number, since it uses less digits than its factorization.

61682573640661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33365411.

The product of its (nonzero) digits is 52254720, while the sum is 61.

The spelling of 61682573640661 in words is "sixty-one trillion, six hundred eighty-two billion, five hundred seventy-three million, six hundred forty thousand, six hundred sixty-one".