2151665474036 has 12 divisors (see below), whose sum is σ = 4055061855012. Its totient is φ = 993076372608.

The previous prime is 2151665473999. The next prime is 2151665474039. The reversal of 2151665474036 is 6304745661512.

It can be written as a sum of positive squares in 2 ways, for example, as 370759210000 + 1780906264036 = 608900^2 + 1334506^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151665474039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20689091045 + ... + 20689091148.

It is an arithmetic number, because the mean of its divisors is an integer number (337921821251).

Almost surely, 2^{2151665474036} is an apocalyptic number.

2151665474036 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2151665474036 is a deficient number, since it is larger than the sum of its proper divisors (1903396380976).

2151665474036 is a wasteful number, since it uses less digits than its factorization.

2151665474036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41378182210 (or 41378182208 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 2151665474036 in words is "two trillion, one hundred fifty-one billion, six hundred sixty-five million, four hundred seventy-four thousand, thirty-six".