15500228677 has 2 divisors, whose sum is σ = 15500228678. Its totient is φ = 15500228676.

The previous prime is 15500228659. The next prime is 15500228683. The reversal of 15500228677 is 77682200551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8744868196 + 6755360481 = 93514^2 + 82191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15500228677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15500228657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7750114338 + 7750114339.

It is an arithmetic number, because the mean of its divisors is an integer number (7750114339).

Almost surely, 2^15500228677 is an apocalyptic number.

It is an amenable number.

15500228677 is a deficient number, since it is larger than the sum of its proper divisors (1).

15500228677 is an equidigital number, since it uses as much as digits as its factorization.

15500228677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 15500228677 in words is "fifteen billion, five hundred million, two hundred twenty-eight thousand, six hundred seventy-seven".