9900749515 has 8 divisors (see below), whose sum is σ = 12133684800. Its totient is φ = 7752076032.

The previous prime is 9900749513. The next prime is 9900749531. The reversal of 9900749515 is 5159470099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9900749515 - 2¹ = 9900749513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9900749513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21065190 + ... + 21065659.

It is an arithmetic number, because the mean of its divisors is an integer number (1516710600).

Almost surely, 2^9900749515 is an apocalyptic number.

9900749515 is a deficient number, since it is larger than the sum of its proper divisors (2232935285).

9900749515 is a wasteful number, since it uses less digits than its factorization.

9900749515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42130901.

The product of its (nonzero) digits is 510300, while the sum is 49.

The square root of 9900749515 is about 99502.5100939670. The cubic root of 9900749515 is about 2147.2833555461.

The spelling of 9900749515 in words is "nine billion, nine hundred million, seven hundred forty-nine thousand, five hundred fifteen".