61377171055 has 16 divisors (see below), whose sum is σ = 74031987744. Its totient is φ = 48849177600.

The previous prime is 61377171041. The next prime is 61377171061. The reversal of 61377171055 is 55017177316.

It is not a de Polignac number, because 61377171055 - 2²⁵ = 61343616623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1377232 + ... + 1421098.

It is an arithmetic number, because the mean of its divisors is an integer number (4626999234).

Almost surely, 2^61377171055 is an apocalyptic number.

61377171055 is a deficient number, since it is larger than the sum of its proper divisors (12654816689).

61377171055 is a wasteful number, since it uses less digits than its factorization.

61377171055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45306.

The product of its (nonzero) digits is 154350, while the sum is 43.

The spelling of 61377171055 in words is "sixty-one billion, three hundred seventy-seven million, one hundred seventy-one thousand, fifty-five".