49209198661 has 16 divisors (see below), whose sum is σ = 56528338048. Its totient is φ = 41962536000.

The previous prime is 49209198653. The next prime is 49209198679. The reversal of 49209198661 is 16689190294.

It is not a de Polignac number, because 49209198661 - 2³ = 49209198653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49209199661) 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, 4870531 + ... + 4880623.

It is an arithmetic number, because the mean of its divisors is an integer number (3533021128).

Almost surely, 2^49209198661 is an apocalyptic number.

It is an amenable number.

49209198661 is a deficient number, since it is larger than the sum of its proper divisors (7319139387).

49209198661 is a wasteful number, since it uses less digits than its factorization.

49209198661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13612.

The product of its (nonzero) digits is 1679616, while the sum is 55.

The spelling of 49209198661 in words is "forty-nine billion, two hundred nine million, one hundred ninety-eight thousand, six hundred sixty-one".