61086505 has 16 divisors (see below), whose sum is σ = 76702464. Its totient is φ = 46615360.

The previous prime is 61086497. The next prime is 61086527. The reversal of 61086505 is 50568016.

It is not a de Polignac number, because 61086505 - 2³ = 61086497 is a prime.

It is a super-2 number, since 2×61086505² = 7463122186230050, which contains 22 as substring.

It is a Duffinian 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, 73995 + ... + 74815.

It is an arithmetic number, because the mean of its divisors is an integer number (4793904).

Almost surely, 2^61086505 is an apocalyptic number.

It is an amenable number.

61086505 is a deficient number, since it is larger than the sum of its proper divisors (15615959).

61086505 is a wasteful number, since it uses less digits than its factorization.

61086505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 61086505 is about 7815.7856290971. The cubic root of 61086505 is about 393.8357105763.

The spelling of 61086505 in words is "sixty-one million, eighty-six thousand, five hundred five".