99729215477 has 32 divisors (see below), whose sum is σ = 105079209984. Its totient is φ = 94540320000.

The previous prime is 99729215461. The next prime is 99729215489. The reversal of 99729215477 is 77451292799.

It is a happy number.

It is not a de Polignac number, because 99729215477 - 2⁴ = 99729215461 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 (99729235477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132794852 + ... + 132795602.

It is an arithmetic number, because the mean of its divisors is an integer number (3283725312).

Almost surely, 2^99729215477 is an apocalyptic number.

It is an amenable number.

99729215477 is a deficient number, since it is larger than the sum of its proper divisors (5349994507).

99729215477 is a wasteful number, since it uses less digits than its factorization.

99729215477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289.

The product of its digits is 20003760, while the sum is 62.

The spelling of 99729215477 in words is "ninety-nine billion, seven hundred twenty-nine million, two hundred fifteen thousand, four hundred seventy-seven".