15611055461 has 4 divisors (see below), whose sum is σ = 15624957792. Its totient is φ = 15597153132.

The previous prime is 15611055457. The next prime is 15611055469. The reversal of 15611055461 is 16455011651.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16455011651 = 13 ⋅1265770127.

It is a cyclic number.

It is not a de Polignac number, because 15611055461 - 2² = 15611055457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15611055469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6949481 + ... + 6951726.

It is an arithmetic number, because the mean of its divisors is an integer number (3906239448).

Almost surely, 2^15611055461 is an apocalyptic number.

It is an amenable number.

15611055461 is a deficient number, since it is larger than the sum of its proper divisors (13902331).

15611055461 is a wasteful number, since it uses less digits than its factorization.

15611055461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13902330.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 15611055461 in words is "fifteen billion, six hundred eleven million, fifty-five thousand, four hundred sixty-one".