15990910690 has 16 divisors (see below), whose sum is σ = 28800034560. Its totient is φ = 6392720880.

The previous prime is 15990910687. The next prime is 15990910757. The reversal of 15990910690 is 9601909951.

It is a super-2 number, since 2×15990910690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436956 + ... + 472135.

It is an arithmetic number, because the mean of its divisors is an integer number (1800002160).

Almost surely, 2^15990910690 is an apocalyptic number.

15990910690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15990910690 is a deficient number, since it is larger than the sum of its proper divisors (12809123870).

15990910690 is a wasteful number, since it uses less digits than its factorization.

15990910690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910857.

The product of its (nonzero) digits is 196830, while the sum is 49.

The spelling of 15990910690 in words is "fifteen billion, nine hundred ninety million, nine hundred ten thousand, six hundred ninety".