61423747566 has 8 divisors (see below), whose sum is σ = 122847495144. Its totient is φ = 20474582520.

The previous prime is 61423747547. The next prime is 61423747571. The reversal of 61423747566 is 66574732416.

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

61423747566 is an admirable number.

It is a congruent number.

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, 5118645625 + ... + 5118645636.

It is an arithmetic number, because the mean of its divisors is an integer number (15355936893).

Almost surely, 2^61423747566 is an apocalyptic number.

61423747566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61423747566 is a wasteful number, since it uses less digits than its factorization.

61423747566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10237291266.

The product of its digits is 5080320, while the sum is 51.

The spelling of 61423747566 in words is "sixty-one billion, four hundred twenty-three million, seven hundred forty-seven thousand, five hundred sixty-six".