2691687525164 has 24 divisors (see below), whose sum is σ = 5304439934976. Its totient is φ = 1184026770000.

The previous prime is 2691687525161. The next prime is 2691687525179. The reversal of 2691687525164 is 4615257861962.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a junction number, because it is equal to n+sod(n) for n = 2691687525097 and 2691687525106.

It is not an unprimeable number, because it can be changed into a prime (2691687525161) by changing a digit.

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, 986687612 + ... + 986690339.

It is an arithmetic number, because the mean of its divisors is an integer number (221018330624).

Almost surely, 2^{2691687525164} is an apocalyptic number.

It is an amenable number.

2691687525164 is a deficient number, since it is larger than the sum of its proper divisors (2612752409812).

2691687525164 is a wasteful number, since it uses less digits than its factorization.

2691687525164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973377997 (or 1973377995 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 62.

The spelling of 2691687525164 in words is "two trillion, six hundred ninety-one billion, six hundred eighty-seven million, five hundred twenty-five thousand, one hundred sixty-four".