2561155413 has 8 divisors (see below), whose sum is σ = 3422654400. Its totient is φ = 1703546688.

The previous prime is 2561155361. The next prime is 2561155423. The reversal of 2561155413 is 3145511652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2561155413 - 2¹⁰ = 2561154389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561155423) 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, 971028 + ... + 973661.

It is an arithmetic number, because the mean of its divisors is an integer number (427831800).

Almost surely, 2^2561155413 is an apocalyptic number.

It is an amenable number.

2561155413 is a deficient number, since it is larger than the sum of its proper divisors (861498987).

2561155413 is a wasteful number, since it uses less digits than its factorization.

2561155413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945131.

The product of its digits is 18000, while the sum is 33.

The square root of 2561155413 is about 50607.8592019066. The cubic root of 2561155413 is about 1368.1865314326.

The spelling of 2561155413 in words is "two billion, five hundred sixty-one million, one hundred fifty-five thousand, four hundred thirteen".