49289566661 has 16 divisors (see below), whose sum is σ = 52436193600. Its totient is φ = 46200492288.

The previous prime is 49289566657. The next prime is 49289566723. The reversal of 49289566661 is 16666598294.

It is a cyclic number.

It is not a de Polignac number, because 49289566661 - 2² = 49289566657 is a prime.

It is a super-2 number, since 2×49289566661² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49289566594 and 49289566603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49289566561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741965 + ... + 805661.

It is an arithmetic number, because the mean of its divisors is an integer number (3277262100).

Almost surely, 2^49289566661 is an apocalyptic number.

It is an amenable number.

49289566661 is a deficient number, since it is larger than the sum of its proper divisors (3146626939).

49289566661 is a wasteful number, since it uses less digits than its factorization.

49289566661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64148.

The product of its digits is 33592320, while the sum is 62.

The spelling of 49289566661 in words is "forty-nine billion, two hundred eighty-nine million, five hundred sixty-six thousand, six hundred sixty-one".