61677778895 has 8 divisors (see below), whose sum is σ = 74037627600. Its totient is φ = 49326027840.

The previous prime is 61677778873. The next prime is 61677778907. The reversal of 61677778895 is 59887777616.

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

It is not a de Polignac number, because 61677778895 - 2⁶ = 61677778831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2007641 + ... + 2038130.

It is an arithmetic number, because the mean of its divisors is an integer number (9254703450).

Almost surely, 2^61677778895 is an apocalyptic number.

61677778895 is a deficient number, since it is larger than the sum of its proper divisors (12359848705).

61677778895 is a wasteful number, since it uses less digits than its factorization.

61677778895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048825.

The product of its digits is 248935680, while the sum is 71.

The spelling of 61677778895 in words is "sixty-one billion, six hundred seventy-seven million, seven hundred seventy-eight thousand, eight hundred ninety-five".