2157945136892 has 12 divisors (see below), whose sum is σ = 3940595467536. Its totient is φ = 1032060717600.

The previous prime is 2157945136849. The next prime is 2157945136901. The reversal of 2157945136892 is 2986315497512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11727962609 + ... + 11727962792.

It is an arithmetic number, because the mean of its divisors is an integer number (328382955628).

Almost surely, 2^{2157945136892} is an apocalyptic number.

It is an amenable number.

2157945136892 is a deficient number, since it is larger than the sum of its proper divisors (1782650330644).

2157945136892 is a wasteful number, since it uses less digits than its factorization.

2157945136892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23455925428 (or 23455925426 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 62.

The spelling of 2157945136892 in words is "two trillion, one hundred fifty-seven billion, nine hundred forty-five million, one hundred thirty-six thousand, eight hundred ninety-two".