61611154223511 has 4 divisors (see below), whose sum is σ = 82148205631352. Its totient is φ = 41074102815672.

The previous prime is 61611154223497. The next prime is 61611154223599. The reversal of 61611154223511 is 11532245111616.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61611154223511 - 2¹⁸ = 61611153961367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61611154223511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61611154223111) 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, 10268525703916 + ... + 10268525703921.

It is an arithmetic number, because the mean of its divisors is an integer number (20537051407838).

Almost surely, 2^{61611154223511} is an apocalyptic number.

61611154223511 is a deficient number, since it is larger than the sum of its proper divisors (20537051407841).

61611154223511 is a wasteful number, since it uses less digits than its factorization.

61611154223511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20537051407840.

The product of its digits is 43200, while the sum is 39.

The spelling of 61611154223511 in words is "sixty-one trillion, six hundred eleven billion, one hundred fifty-four million, two hundred twenty-three thousand, five hundred eleven".