61405616255 has 8 divisors (see below), whose sum is σ = 73808138112. Its totient is φ = 49043560608.

The previous prime is 61405616221. The next prime is 61405616257. The reversal of 61405616255 is 55261650416.

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

It is a cyclic number.

It is not a de Polignac number, because 61405616255 - 2¹⁰ = 61405615231 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 (61405616257) 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, 10113212 + ... + 10119281.

It is an arithmetic number, because the mean of its divisors is an integer number (9226017264).

Almost surely, 2^61405616255 is an apocalyptic number.

61405616255 is a deficient number, since it is larger than the sum of its proper divisors (12402521857).

61405616255 is a wasteful number, since it uses less digits than its factorization.

61405616255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20233105.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 61405616255 in words is "sixty-one billion, four hundred five million, six hundred sixteen thousand, two hundred fifty-five".