2561770153 has 4 divisors (see below), whose sum is σ = 2673151488. Its totient is φ = 2450388820.

The previous prime is 2561770111. The next prime is 2561770163. The reversal of 2561770153 is 3510771652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2561770153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2561770163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55690633 + ... + 55690678.

It is an arithmetic number, because the mean of its divisors is an integer number (668287872).

Almost surely, 2^2561770153 is an apocalyptic number.

2561770153 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2561770153 is a deficient number, since it is larger than the sum of its proper divisors (111381335).

2561770153 is a wasteful number, since it uses less digits than its factorization.

2561770153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111381334.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 2561770153 is about 50613.9324000813. The cubic root of 2561770153 is about 1368.2959887632.

The spelling of 2561770153 in words is "two billion, five hundred sixty-one million, seven hundred seventy thousand, one hundred fifty-three".