99618860951 has 4 divisors (see below), whose sum is σ = 101738411232. Its totient is φ = 97499310672.

The previous prime is 99618860923. The next prime is 99618860953. The reversal of 99618860951 is 15906881699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99618860951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99618860953) 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, 1059775070 + ... + 1059775163.

It is an arithmetic number, because the mean of its divisors is an integer number (25434602808).

Almost surely, 2^99618860951 is an apocalyptic number.

99618860951 is a deficient number, since it is larger than the sum of its proper divisors (2119550281).

99618860951 is a wasteful number, since it uses less digits than its factorization.

99618860951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119550280.

The product of its (nonzero) digits is 8398080, while the sum is 62.

The spelling of 99618860951 in words is "ninety-nine billion, six hundred eighteen million, eight hundred sixty thousand, nine hundred fifty-one".