61271617 has 12 divisors (see below), whose sum is σ = 67851280. Its totient is φ = 55285560.

The previous prime is 61271533. The next prime is 61271629. The reversal of 61271617 is 71617216.

It is not a de Polignac number, because 61271617 - 2⁷ = 61271489 is a prime.

It is a super-2 number, since 2×61271617² = 7508422099589378, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61271317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14998 + ... + 18640.

Almost surely, 2^61271617 is an apocalyptic number.

It is an amenable number.

61271617 is a deficient number, since it is larger than the sum of its proper divisors (6579663).

61271617 is a wasteful number, since it uses less digits than its factorization.

61271617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3804 (or 3793 counting only the distinct ones).

The product of its digits is 3528, while the sum is 31.

The square root of 61271617 is about 7827.6188588868. The cubic root of 61271617 is about 394.2331262254.

It can be divided in two parts, 6127 and 1617, that added together give a square (7744 = 88²).

The spelling of 61271617 in words is "sixty-one million, two hundred seventy-one thousand, six hundred seventeen".