9955581515 has 8 divisors (see below), whose sum is σ = 13032761328. Its totient is φ = 7240422880.

The previous prime is 9955581511. The next prime is 9955581541. The reversal of 9955581515 is 5151855599.

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

It is not a de Polignac number, because 9955581515 - 2² = 9955581511 is a prime.

It is a super-2 number, since 2×9955581515² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9955581511) 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, 90505232 + ... + 90505341.

It is an arithmetic number, because the mean of its divisors is an integer number (1629095166).

Almost surely, 2^9955581515 is an apocalyptic number.

9955581515 is a deficient number, since it is larger than the sum of its proper divisors (3077179813).

9955581515 is a wasteful number, since it uses less digits than its factorization.

9955581515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181010589.

The product of its digits is 2025000, while the sum is 53.

The square root of 9955581515 is about 99777.6604005125. The cubic root of 9955581515 is about 2151.2400645063.

The spelling of 9955581515 in words is "nine billion, nine hundred fifty-five million, five hundred eighty-one thousand, five hundred fifteen".