2157246763751 has 2 divisors, whose sum is σ = 2157246763752. Its totient is φ = 2157246763750.

The previous prime is 2157246763741. The next prime is 2157246763843. The reversal of 2157246763751 is 1573676427512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157246763751 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157246763741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078623381875 + 1078623381876.

It is an arithmetic number, because the mean of its divisors is an integer number (1078623381876).

Almost surely, 2^{2157246763751} is an apocalyptic number.

2157246763751 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157246763751 is an equidigital number, since it uses as much as digits as its factorization.

2157246763751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14817600, while the sum is 56.

The spelling of 2157246763751 in words is "two trillion, one hundred fifty-seven billion, two hundred forty-six million, seven hundred sixty-three thousand, seven hundred fifty-one".