15670955985 has 16 divisors (see below), whose sum is σ = 25075788864. Its totient is φ = 8357090112.

The previous prime is 15670955981. The next prime is 15670956013. The reversal of 15670955985 is 58955907651.

It is not a de Polignac number, because 15670955985 - 2² = 15670955981 is a prime.

It is a super-2 number, since 2×15670955985² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15670955981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152154 + ... + 233436.

It is an arithmetic number, because the mean of its divisors is an integer number (1567236804).

Almost surely, 2^15670955985 is an apocalyptic number.

15670955985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15670955985 is a deficient number, since it is larger than the sum of its proper divisors (9404832879).

15670955985 is a wasteful number, since it uses less digits than its factorization.

15670955985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94144.

The product of its (nonzero) digits is 17010000, while the sum is 60.

The spelling of 15670955985 in words is "fifteen billion, six hundred seventy million, nine hundred fifty-five thousand, nine hundred eighty-five".