157663853857 has 2 divisors, whose sum is σ = 157663853858. Its totient is φ = 157663853856.

The previous prime is 157663853813. The next prime is 157663853861. The reversal of 157663853857 is 758358366751.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155109157921 + 2554695936 = 393839^2 + 50544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157663853857 is a prime.

It is not a weakly prime, because it can be changed into another prime (157663853257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78831926928 + 78831926929.

It is an arithmetic number, because the mean of its divisors is an integer number (78831926929).

Almost surely, 2^157663853857 is an apocalyptic number.

It is an amenable number.

157663853857 is a deficient number, since it is larger than the sum of its proper divisors (1).

157663853857 is an equidigital number, since it uses as much as digits as its factorization.

157663853857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008000, while the sum is 64.

The spelling of 157663853857 in words is "one hundred fifty-seven billion, six hundred sixty-three million, eight hundred fifty-three thousand, eight hundred fifty-seven".