15955798501 has 2 divisors, whose sum is σ = 15955798502. Its totient is φ = 15955798500.

The previous prime is 15955798499. The next prime is 15955798519. The reversal of 15955798501 is 10589755951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12735122500 + 3220676001 = 112850^2 + 56751^2 .

It is a cyclic number.

It is not a de Polignac number, because 15955798501 - 2¹ = 15955798499 is a prime.

Together with 15955798499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15955798561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7977899250 + 7977899251.

It is an arithmetic number, because the mean of its divisors is an integer number (7977899251).

Almost surely, 2^15955798501 is an apocalyptic number.

It is an amenable number.

15955798501 is a deficient number, since it is larger than the sum of its proper divisors (1).

15955798501 is an equidigital number, since it uses as much as digits as its factorization.

15955798501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2835000, while the sum is 55.

The spelling of 15955798501 in words is "fifteen billion, nine hundred fifty-five million, seven hundred ninety-eight thousand, five hundred one".