157285758781 has 2 divisors, whose sum is σ = 157285758782. Its totient is φ = 157285758780.

The previous prime is 157285758733. The next prime is 157285758793. The reversal of 157285758781 is 187857582751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135074625625 + 22211133156 = 367525^2 + 149034^2 .

It is an emirp because it is prime and its reverse (187857582751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157285758781 - 2³⁷ = 19846805309 is a prime.

It is a super-2 number, since 2×157285758781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157285758881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78642879390 + 78642879391.

It is an arithmetic number, because the mean of its divisors is an integer number (78642879391).

Almost surely, 2^157285758781 is an apocalyptic number.

It is an amenable number.

157285758781 is a deficient number, since it is larger than the sum of its proper divisors (1).

157285758781 is an equidigital number, since it uses as much as digits as its factorization.

157285758781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43904000, while the sum is 64.

The spelling of 157285758781 in words is "one hundred fifty-seven billion, two hundred eighty-five million, seven hundred fifty-eight thousand, seven hundred eighty-one".