157188970693 has 2 divisors, whose sum is σ = 157188970694. Its totient is φ = 157188970692.

The previous prime is 157188970681. The next prime is 157188970723. The reversal of 157188970693 is 396079881751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104159171169 + 53029799524 = 322737^2 + 230282^2 .

It is a cyclic number.

It is not a de Polignac number, because 157188970693 - 2⁹ = 157188970181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157188979693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78594485346 + 78594485347.

It is an arithmetic number, because the mean of its divisors is an integer number (78594485347).

Almost surely, 2^157188970693 is an apocalyptic number.

It is an amenable number.

157188970693 is a deficient number, since it is larger than the sum of its proper divisors (1).

157188970693 is an equidigital number, since it uses as much as digits as its factorization.

157188970693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22861440, while the sum is 64.

The spelling of 157188970693 in words is "one hundred fifty-seven billion, one hundred eighty-eight million, nine hundred seventy thousand, six hundred ninety-three".