315889708777 has 2 divisors, whose sum is σ = 315889708778. Its totient is φ = 315889708776.

The previous prime is 315889708747. The next prime is 315889708801. The reversal of 315889708777 is 777807988513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239501593321 + 76388115456 = 489389^2 + 276384^2 .

It is a cyclic number.

It is not a de Polignac number, because 315889708777 - 2¹⁵ = 315889676009 is a prime.

It is a super-2 number, since 2×315889708777² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315889708727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157944854388 + 157944854389.

It is an arithmetic number, because the mean of its divisors is an integer number (157944854389).

Almost surely, 2^315889708777 is an apocalyptic number.

It is an amenable number.

315889708777 is a deficient number, since it is larger than the sum of its proper divisors (1).

315889708777 is an equidigital number, since it uses as much as digits as its factorization.

315889708777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165957120, while the sum is 70.

The spelling of 315889708777 in words is "three hundred fifteen billion, eight hundred eighty-nine million, seven hundred eight thousand, seven hundred seventy-seven".