61406149353217 has 8 divisors (see below), whose sum is σ = 63770776338600. Its totient is φ = 59058000605184.

The previous prime is 61406149353167. The next prime is 61406149353221. The reversal of 61406149353217 is 71235394160416.

It can be written as a sum of positive squares in 4 ways, for example, as 39603749508801 + 21802399844416 = 6293151^2 + 4669304^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61406149353217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61406149353247) 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, 4119551742 + ... + 4119566647.

It is an arithmetic number, because the mean of its divisors is an integer number (7971347042325).

Almost surely, 2^{61406149353217} is an apocalyptic number.

It is an amenable number.

61406149353217 is a deficient number, since it is larger than the sum of its proper divisors (2364626985383).

61406149353217 is a wasteful number, since it uses less digits than its factorization.

61406149353217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239118675.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 61406149353217 in words is "sixty-one trillion, four hundred six billion, one hundred forty-nine million, three hundred fifty-three thousand, two hundred seventeen".