61658664215641 has 8 divisors (see below), whose sum is σ = 61830762692000. Its totient is φ = 61486615270080.

The previous prime is 61658664215633. The next prime is 61658664215717. The reversal of 61658664215641 is 14651246685616.

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 61658664215641 - 2³ = 61658664215633 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 61658664215641.

It is not an unprimeable number, because it can be changed into a prime (61658664215741) 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, 9888816 + ... + 14869633.

It is an arithmetic number, because the mean of its divisors is an integer number (7728845336500).

Almost surely, 2^{61658664215641} is an apocalyptic number.

It is an amenable number.

61658664215641 is a deficient number, since it is larger than the sum of its proper divisors (172098476359).

61658664215641 is a wasteful number, since it uses less digits than its factorization.

61658664215641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24765399.

The product of its digits is 49766400, while the sum is 61.

The spelling of 61658664215641 in words is "sixty-one trillion, six hundred fifty-eight billion, six hundred sixty-four million, two hundred fifteen thousand, six hundred forty-one".