2015554451597 has 2 divisors, whose sum is σ = 2015554451598. Its totient is φ = 2015554451596.

The previous prime is 2015554451527. The next prime is 2015554451623. The reversal of 2015554451597 is 7951544555102.

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., 1446164984356 + 569389467241 = 1202566^2 + 754579^2 .

It is a cyclic number.

It is not a de Polignac number, because 2015554451597 - 2¹⁰ = 2015554450573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2015554451527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007777225798 + 1007777225799.

It is an arithmetic number, because the mean of its divisors is an integer number (1007777225799).

Almost surely, 2^{2015554451597} is an apocalyptic number.

It is an amenable number.

2015554451597 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015554451597 is an equidigital number, since it uses as much as digits as its factorization.

2015554451597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300000, while the sum is 53.

The spelling of 2015554451597 in words is "two trillion, fifteen billion, five hundred fifty-four million, four hundred fifty-one thousand, five hundred ninety-seven".