61677161671 has 16 divisors (see below), whose sum is σ = 64504978560. Its totient is φ = 58923738720.

The previous prime is 61677161659. The next prime is 61677161677. The reversal of 61677161671 is 17616177616.

It is a cyclic number.

It is not a de Polignac number, because 61677161671 - 2⁹ = 61677161159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61677161677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403836 + ... + 535198.

It is an arithmetic number, because the mean of its divisors is an integer number (4031561160).

Almost surely, 2^61677161671 is an apocalyptic number.

61677161671 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

61677161671 is a deficient number, since it is larger than the sum of its proper divisors (2827816889).

61677161671 is a wasteful number, since it uses less digits than its factorization.

61677161671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131646.

The product of its digits is 444528, while the sum is 49.

The spelling of 61677161671 in words is "sixty-one billion, six hundred seventy-seven million, one hundred sixty-one thousand, six hundred seventy-one".