785143968157 has 2 divisors, whose sum is σ = 785143968158. Its totient is φ = 785143968156.

The previous prime is 785143968101. The next prime is 785143968229. The reversal of 785143968157 is 751869341587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 710773769476 + 74370198681 = 843074^2 + 272709^2 .

It is a cyclic number.

It is not a de Polignac number, because 785143968157 - 2³¹ = 782996484509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (785143968757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392571984078 + 392571984079.

It is an arithmetic number, because the mean of its divisors is an integer number (392571984079).

Almost surely, 2^785143968157 is an apocalyptic number.

It is an amenable number.

785143968157 is a deficient number, since it is larger than the sum of its proper divisors (1).

785143968157 is an equidigital number, since it uses as much as digits as its factorization.

785143968157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50803200, while the sum is 64.

The spelling of 785143968157 in words is "seven hundred eighty-five billion, one hundred forty-three million, nine hundred sixty-eight thousand, one hundred fifty-seven".