2555321601556 has 24 divisors (see below), whose sum is σ = 4600744240680. Its totient is φ = 1240944625152.

The previous prime is 2555321601529. The next prime is 2555321601559. The reversal of 2555321601556 is 6551061235552.

It can be written as a sum of positive squares in 4 ways, for example, as 1080393936400 + 1474927665156 = 1039420^2 + 1214466^2 .

It is a super-2 number, since 2×2555321601556² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555321601559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15087745 + ... + 15256168.

It is an arithmetic number, because the mean of its divisors is an integer number (191697676695).

Almost surely, 2^{2555321601556} is an apocalyptic number.

It is an amenable number.

2555321601556 is a deficient number, since it is larger than the sum of its proper divisors (2045422639124).

2555321601556 is a wasteful number, since it uses less digits than its factorization.

2555321601556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30344523 (or 30344521 counting only the distinct ones).

The product of its (nonzero) digits is 1350000, while the sum is 46.

The spelling of 2555321601556 in words is "two trillion, five hundred fifty-five billion, three hundred twenty-one million, six hundred one thousand, five hundred fifty-six".