16031478877 has 2 divisors, whose sum is σ = 16031478878. Its totient is φ = 16031478876.

The previous prime is 16031478857. The next prime is 16031478887. The reversal of 16031478877 is 77887413061.

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., 12423554521 + 3607924356 = 111461^2 + 60066^2 .

It is a cyclic number.

It is not a de Polignac number, because 16031478877 - 2²³ = 16023090269 is a prime.

It is a super-2 number, since 2×16031478877² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16031478847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8015739438 + 8015739439.

It is an arithmetic number, because the mean of its divisors is an integer number (8015739439).

Almost surely, 2^16031478877 is an apocalyptic number.

It is an amenable number.

16031478877 is a deficient number, since it is larger than the sum of its proper divisors (1).

16031478877 is an equidigital number, since it uses as much as digits as its factorization.

16031478877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1580544, while the sum is 52.

The spelling of 16031478877 in words is "sixteen billion, thirty-one million, four hundred seventy-eight thousand, eight hundred seventy-seven".