3661651902553 has 8 divisors (see below), whose sum is σ = 3854774171520. Its totient is φ = 3468570008400.

The previous prime is 3661651902523. The next prime is 3661651902569. The reversal of 3661651902553 is 3552091561663.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3661651902553 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 3661651902553.

It is not an unprimeable number, because it can be changed into a prime (3661651902523) 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, 9907450 + ... + 10270387.

It is an arithmetic number, because the mean of its divisors is an integer number (481846771440).

Almost surely, 2^{3661651902553} is an apocalyptic number.

It is an amenable number.

3661651902553 is a deficient number, since it is larger than the sum of its proper divisors (193122268967).

3661651902553 is a wasteful number, since it uses less digits than its factorization.

3661651902553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20187407.

The product of its (nonzero) digits is 4374000, while the sum is 52.

The spelling of 3661651902553 in words is "three trillion, six hundred sixty-one billion, six hundred fifty-one million, nine hundred two thousand, five hundred fifty-three".