61851263766 has 12 divisors (see below), whose sum is σ = 123703745916. Its totient is φ = 20616884860.

The previous prime is 61851263759. The next prime is 61851263807. The reversal of 61851263766 is 66736215816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558421 + ... + 659951.

It is an arithmetic number, because the mean of its divisors is an integer number (10308645493).

Almost surely, 2^61851263766 is an apocalyptic number.

61851263766 is an abundant number, since it is smaller than the sum of its proper divisors (61852482150).

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

61851263766 is an frugal number, since it uses more digits than its factorization.

61851263766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203067 (or 101536 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The spelling of 61851263766 in words is "sixty-one billion, eight hundred fifty-one million, two hundred sixty-three thousand, seven hundred sixty-six".