61408770145 has 8 divisors (see below), whose sum is σ = 74102204160. Its totient is φ = 48852562800.

The previous prime is 61408770023. The next prime is 61408770169. The reversal of 61408770145 is 54107780416.

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

It is not a de Polignac number, because 61408770145 - 2²⁹ = 60871899233 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, 34305681 + ... + 34307470.

It is an arithmetic number, because the mean of its divisors is an integer number (9262775520).

Almost surely, 2^61408770145 is an apocalyptic number.

It is an amenable number.

61408770145 is a deficient number, since it is larger than the sum of its proper divisors (12693434015).

61408770145 is a wasteful number, since it uses less digits than its factorization.

61408770145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68613335.

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 61408770145 in words is "sixty-one billion, four hundred eight million, seven hundred seventy thousand, one hundred forty-five".