157857474077 has 2 divisors, whose sum is σ = 157857474078. Its totient is φ = 157857474076.

The previous prime is 157857473999. The next prime is 157857474079. The reversal of 157857474077 is 770474758751.

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., 157359782596 + 497691481 = 396686^2 + 22309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157857474077 is a prime.

Together with 157857474079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157857474079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78928737038 + 78928737039.

It is an arithmetic number, because the mean of its divisors is an integer number (78928737039).

Almost surely, 2^157857474077 is an apocalyptic number.

It is an amenable number.

157857474077 is a deficient number, since it is larger than the sum of its proper divisors (1).

157857474077 is an equidigital number, since it uses as much as digits as its factorization.

157857474077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53782400, while the sum is 62.

The spelling of 157857474077 in words is "one hundred fifty-seven billion, eight hundred fifty-seven million, four hundred seventy-four thousand, seventy-seven".