2561154585360 has 320 divisors, whose sum is σ = 9610601882112. Its totient is φ = 550796525568.

The previous prime is 2561154585337. The next prime is 2561154585371. The reversal of 2561154585360 is 635854511652.

It is a super-2 number, since 2×2561154585360² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 103289124 + ... + 103313916.

Almost surely, 2^{2561154585360} is an apocalyptic number.

2561154585360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2561154585360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4805300941056).

2561154585360 is an abundant number, since it is smaller than the sum of its proper divisors (7049447296752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561154585360 is a wasteful number, since it uses less digits than its factorization.

2561154585360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28450 (or 28444 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 51.

The spelling of 2561154585360 in words is "two trillion, five hundred sixty-one billion, one hundred fifty-four million, five hundred eighty-five thousand, three hundred sixty".