61274238566 has 4 divisors (see below), whose sum is σ = 91911357852. Its totient is φ = 30637119282.

The previous prime is 61274238539. The next prime is 61274238601. The reversal of 61274238566 is 66583247216.

It is a happy number.

61274238566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15318559640 + ... + 15318559643.

It is an arithmetic number, because the mean of its divisors is an integer number (22977839463).

Almost surely, 2^61274238566 is an apocalyptic number.

61274238566 is a deficient number, since it is larger than the sum of its proper divisors (30637119286).

61274238566 is a wasteful number, since it uses less digits than its factorization.

61274238566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30637119285.

The product of its digits is 2903040, while the sum is 50.

The spelling of 61274238566 in words is "sixty-one billion, two hundred seventy-four million, two hundred thirty-eight thousand, five hundred sixty-six".