61895581465 has 8 divisors (see below), whose sum is σ = 74282382720. Its totient is φ = 49511341872.

The previous prime is 61895581457. The next prime is 61895581481. The reversal of 61895581465 is 56418559816.

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 61895581465 - 2³ = 61895581457 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586849 + ... + 684238.

It is an arithmetic number, because the mean of its divisors is an integer number (9285297840).

Almost surely, 2^61895581465 is an apocalyptic number.

It is an amenable number.

61895581465 is a deficient number, since it is larger than the sum of its proper divisors (12386801255).

61895581465 is a wasteful number, since it uses less digits than its factorization.

61895581465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280831.

The product of its digits is 10368000, while the sum is 58.

The spelling of 61895581465 in words is "sixty-one billion, eight hundred ninety-five million, five hundred eighty-one thousand, four hundred sixty-five".