61508 has 6 divisors (see below), whose sum is σ = 107646. Its totient is φ = 30752.

The previous prime is 61507. The next prime is 61511. The reversal of 61508 is 80516.

It can be written as a sum of positive squares in only one way, i.e., 61504 + 4 = 248^2 + 2^2 .

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 61508.

It is not an unprimeable number, because it can be changed into a prime (61507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7685 + ... + 7692.

It is an arithmetic number, because the mean of its divisors is an integer number (17941).

2⁶¹⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

61508 is a deficient number, since it is larger than the sum of its proper divisors (46138).

61508 is a wasteful number, since it uses less digits than its factorization.

61508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15381 (or 15379 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 61508 is about 248.0080643850. The cubic root of 61508 is about 39.4739453238.

The spelling of 61508 in words is "sixty-one thousand, five hundred eight".