99539577401 has 4 divisors (see below), whose sum is σ = 108588629904. Its totient is φ = 90490524900.

The previous prime is 99539577359. The next prime is 99539577421. The reversal of 99539577401 is 10477593599.

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 a de Polignac number, because none of the positive numbers 2^k-99539577401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99539577421) 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, 4524526235 + ... + 4524526256.

It is an arithmetic number, because the mean of its divisors is an integer number (27147157476).

Almost surely, 2^99539577401 is an apocalyptic number.

It is an amenable number.

99539577401 is a deficient number, since it is larger than the sum of its proper divisors (9049052503).

99539577401 is a wasteful number, since it uses less digits than its factorization.

99539577401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9049052502.

The product of its (nonzero) digits is 10716300, while the sum is 59.

The spelling of 99539577401 in words is "ninety-nine billion, five hundred thirty-nine million, five hundred seventy-seven thousand, four hundred one".