99578720901 has 16 divisors (see below), whose sum is σ = 148210191360. Its totient is φ = 58947233520.

The previous prime is 99578720861. The next prime is 99578720911. The reversal of 99578720901 is 10902787599.

It is not a de Polignac number, because 99578720901 - 2¹⁷ = 99578589829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99578720911) 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, 35086221 + ... + 35089058.

It is an arithmetic number, because the mean of its divisors is an integer number (9263136960).

Almost surely, 2^99578720901 is an apocalyptic number.

It is an amenable number.

99578720901 is a deficient number, since it is larger than the sum of its proper divisors (48631470459).

99578720901 is a wasteful number, since it uses less digits than its factorization.

99578720901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70175336.

The product of its (nonzero) digits is 2857680, while the sum is 57.

The spelling of 99578720901 in words is "ninety-nine billion, five hundred seventy-eight million, seven hundred twenty thousand, nine hundred one".