61492556874961 has 3 divisors (see below), whose sum is σ = 61492564716681. Its totient is φ = 61492549033242.

The previous prime is 61492556874949. The next prime is 61492556875003. The reversal of 61492556874961 is 16947865529416.

The square root of 61492556874961 is 7841719.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 61492556874961 - 2⁹ = 61492556874449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61492556874461) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3920860 + ... + 11762578.

It is an arithmetic number, because the mean of its divisors is an integer number (20497521572227).

Almost surely, 2^{61492556874961} is an apocalyptic number.

61492556874961 is the 7841719-th square number.

61492556874961 is the 3920860-th centered octagonal number.

It is an amenable number.

61492556874961 is a deficient number, since it is larger than the sum of its proper divisors (7841720).

61492556874961 is an frugal number, since it uses more digits than its factorization.

61492556874961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15683438 (or 7841719 counting only the distinct ones).

The product of its digits is 783820800, while the sum is 73.

The spelling of 61492556874961 in words is "sixty-one trillion, four hundred ninety-two billion, five hundred fifty-six million, eight hundred seventy-four thousand, nine hundred sixty-one".