61913466159145 has 4 divisors (see below), whose sum is σ = 74296159390980. Its totient is φ = 49530772927312.

The previous prime is 61913466159133. The next prime is 61913466159179. The reversal of 61913466159145 is 54195166431916.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20158762002201 + 41754704156944 = 4489851^2 + 6461788^2 .

It is a cyclic number.

It is not a de Polignac number, because 61913466159145 - 2⁹ = 61913466158633 is a prime.

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, 6191346615910 + ... + 6191346615919.

It is an arithmetic number, because the mean of its divisors is an integer number (18574039847745).

Almost surely, 2^{61913466159145} is an apocalyptic number.

It is an amenable number.

61913466159145 is a deficient number, since it is larger than the sum of its proper divisors (12382693231835).

61913466159145 is a wasteful number, since it uses less digits than its factorization.

61913466159145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12382693231834.

The product of its digits is 20995200, while the sum is 61.

The spelling of 61913466159145 in words is "sixty-one trillion, nine hundred thirteen billion, four hundred sixty-six million, one hundred fifty-nine thousand, one hundred forty-five".