99477790801 has 9 divisors (see below), whose sum is σ = 105679335441. Its totient is φ = 93621109632.

The previous prime is 99477790771. The next prime is 99477790813. The reversal of 99477790801 is 10809777499.

The square root of 99477790801 is 315401.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5155096401 + 94322694400 = 71799^2 + 307120^2 .

It is not a de Polignac number, because 99477790801 - 2⁹ = 99477790289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99477790801.

It is not an unprimeable number, because it can be changed into a prime (99477790201) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5352541 + ... + 5371093.

Almost surely, 2^99477790801 is an apocalyptic number.

99477790801 is the 315401-st square number.

99477790801 is the 157701-st centered octagonal number.

It is an amenable number.

99477790801 is a deficient number, since it is larger than the sum of its proper divisors (6201544640).

99477790801 is an frugal number, since it uses more digits than its factorization.

99477790801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37140 (or 18570 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 61.

The spelling of 99477790801 in words is "ninety-nine billion, four hundred seventy-seven million, seven hundred ninety thousand, eight hundred one".