61167913277 has 4 divisors (see below), whose sum is σ = 61325157660. Its totient is φ = 61010668896.

The previous prime is 61167913241. The next prime is 61167913291. The reversal of 61167913277 is 77231976116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38801514361 + 22366398916 = 196981^2 + 149554^2 .

It is a cyclic number.

It is not a de Polignac number, because 61167913277 - 2¹² = 61167909181 is a prime.

It is a super-2 number, since 2×61167913277² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61167910277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78621608 + ... + 78622385.

It is an arithmetic number, because the mean of its divisors is an integer number (15331289415).

Almost surely, 2^61167913277 is an apocalyptic number.

It is an amenable number.

61167913277 is a deficient number, since it is larger than the sum of its proper divisors (157244383).

61167913277 is a wasteful number, since it uses less digits than its factorization.

61167913277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157244382.

The product of its digits is 666792, while the sum is 50.

The spelling of 61167913277 in words is "sixty-one billion, one hundred sixty-seven million, nine hundred thirteen thousand, two hundred seventy-seven".