61181376861 has 8 divisors (see below), whose sum is σ = 88991093664. Its totient is φ = 37079622320.

The previous prime is 61181376833. The next prime is 61181376863. The reversal of 61181376861 is 16867318116.

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

It is a cyclic number.

It is not a de Polignac number, because 61181376861 - 2¹³ = 61181368669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61181376861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61181376863) 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, 926990526 + ... + 926990591.

It is an arithmetic number, because the mean of its divisors is an integer number (11123886708).

Almost surely, 2^61181376861 is an apocalyptic number.

It is an amenable number.

61181376861 is a deficient number, since it is larger than the sum of its proper divisors (27809716803).

61181376861 is a wasteful number, since it uses less digits than its factorization.

61181376861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853981131.

The product of its digits is 290304, while the sum is 48.

The spelling of 61181376861 in words is "sixty-one billion, one hundred eighty-one million, three hundred seventy-six thousand, eight hundred sixty-one".