61447255895 has 8 divisors (see below), whose sum is σ = 76115310720. Its totient is φ = 47572068960.

The previous prime is 61447255873. The next prime is 61447255901. The reversal of 61447255895 is 59855274416.

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

It is not a de Polignac number, because 61447255895 - 2¹⁶ = 61447190359 is a prime.

It is a super-2 number, since 2×61447255895² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61447255895.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198216800 + ... + 198217109.

It is an arithmetic number, because the mean of its divisors is an integer number (9514413840).

Almost surely, 2^61447255895 is an apocalyptic number.

61447255895 is a deficient number, since it is larger than the sum of its proper divisors (14668054825).

61447255895 is a wasteful number, since it uses less digits than its factorization.

61447255895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396433945.

The product of its digits is 12096000, while the sum is 56.

The spelling of 61447255895 in words is "sixty-one billion, four hundred forty-seven million, two hundred fifty-five thousand, eight hundred ninety-five".