99479977985 has 16 divisors (see below), whose sum is σ = 125717813760. Its totient is φ = 75360015360.

The previous prime is 99479977973. The next prime is 99479978069. The reversal of 99479977985 is 58977997499.

It is not a de Polignac number, because 99479977985 - 2¹² = 99479973889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40736 + ... + 447905.

It is an arithmetic number, because the mean of its divisors is an integer number (7857363360).

It is a Proth number, since it is equal to 189743 ⋅ 2¹⁹ + 1 and 189743 < 2¹⁹.

Almost surely, 2^99479977985 is an apocalyptic number.

99479977985 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

99479977985 is a deficient number, since it is larger than the sum of its proper divisors (26237835775).

99479977985 is a wasteful number, since it uses less digits than its factorization.

99479977985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490808.

The product of its digits is 3240609120, while the sum is 83.

The spelling of 99479977985 in words is "ninety-nine billion, four hundred seventy-nine million, nine hundred seventy-seven thousand, nine hundred eighty-five".