2654661561 has 8 divisors (see below), whose sum is σ = 3539815680. Its totient is φ = 1769640912.

The previous prime is 2654661557. The next prime is 2654661577. The reversal of 2654661561 is 1651664562.

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

It is not a de Polignac number, because 2654661561 - 2² = 2654661557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2654661511) 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, 30520 + ... + 78998.

It is an arithmetic number, because the mean of its divisors is an integer number (442476960).

Almost surely, 2^2654661561 is an apocalyptic number.

It is an amenable number.

2654661561 is a deficient number, since it is larger than the sum of its proper divisors (885154119).

2654661561 is a wasteful number, since it uses less digits than its factorization.

2654661561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66735.

The product of its digits is 259200, while the sum is 42.

The square root of 2654661561 is about 51523.4078938884. The cubic root of 2654661561 is about 1384.6384492452.

The spelling of 2654661561 in words is "two billion, six hundred fifty-four million, six hundred sixty-one thousand, five hundred sixty-one".