61718099201 has 4 divisors (see below), whose sum is σ = 67328835504. Its totient is φ = 56107362900.

The previous prime is 61718099173. The next prime is 61718099239. The reversal of 61718099201 is 10299081716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61718099201 - 2²² = 61713904897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61718099281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2805368135 + ... + 2805368156.

It is an arithmetic number, because the mean of its divisors is an integer number (16832208876).

Almost surely, 2^61718099201 is an apocalyptic number.

It is an amenable number.

61718099201 is a deficient number, since it is larger than the sum of its proper divisors (5610736303).

61718099201 is a wasteful number, since it uses less digits than its factorization.

61718099201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610736302.

The product of its (nonzero) digits is 54432, while the sum is 44.

The spelling of 61718099201 in words is "sixty-one billion, seven hundred eighteen million, ninety-nine thousand, two hundred one".