17955915797 has 16 divisors (see below), whose sum is σ = 19128508992. Its totient is φ = 16796478720.

The previous prime is 17955915787. The next prime is 17955915799. The reversal of 17955915797 is 79751955971.

It is not a de Polignac number, because 17955915797 - 2⁸ = 17955915541 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 (17955915799) 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, 2963423 + ... + 2969475.

It is an arithmetic number, because the mean of its divisors is an integer number (1195531812).

Almost surely, 2^17955915797 is an apocalyptic number.

17955915797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

17955915797 is a deficient number, since it is larger than the sum of its proper divisors (1172593195).

17955915797 is a wasteful number, since it uses less digits than its factorization.

17955915797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108.

The product of its digits is 31255875, while the sum is 65.

The spelling of 17955915797 in words is "seventeen billion, nine hundred fifty-five million, nine hundred fifteen thousand, seven hundred ninety-seven".