2157165134745 has 8 divisors (see below), whose sum is σ = 3451464215616. Its totient is φ = 1150488071856.

The previous prime is 2157165134731. The next prime is 2157165134779. The reversal of 2157165134745 is 5474315617512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2157165134745 - 2⁵ = 2157165134713 is a prime.

It is a super-2 number, since 2×2157165134745² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71905504477 + ... + 71905504506.

It is an arithmetic number, because the mean of its divisors is an integer number (431433026952).

Almost surely, 2^{2157165134745} is an apocalyptic number.

It is an amenable number.

2157165134745 is a deficient number, since it is larger than the sum of its proper divisors (1294299080871).

2157165134745 is a wasteful number, since it uses less digits than its factorization.

2157165134745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143811008991.

The product of its digits is 3528000, while the sum is 51.

The spelling of 2157165134745 in words is "two trillion, one hundred fifty-seven billion, one hundred sixty-five million, one hundred thirty-four thousand, seven hundred forty-five".