61454663555 has 4 divisors (see below), whose sum is σ = 73745596272. Its totient is φ = 49163730840.

The previous prime is 61454663533. The next prime is 61454663581. The reversal of 61454663555 is 55536645416.

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

It is not a de Polignac number, because 61454663555 - 2²⁰ = 61453614979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6145466351 + ... + 6145466360.

It is an arithmetic number, because the mean of its divisors is an integer number (18436399068).

Almost surely, 2^61454663555 is an apocalyptic number.

61454663555 is a deficient number, since it is larger than the sum of its proper divisors (12290932717).

61454663555 is a wasteful number, since it uses less digits than its factorization.

61454663555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12290932716.

The product of its digits is 6480000, while the sum is 50.

The spelling of 61454663555 in words is "sixty-one billion, four hundred fifty-four million, six hundred sixty-three thousand, five hundred fifty-five".