61688115 has 16 divisors (see below), whose sum is σ = 109668000. Its totient is φ = 32900256.

The previous prime is 61688083. The next prime is 61688119. The reversal of 61688115 is 51188616.

It is not a de Polignac number, because 61688115 - 2⁵ = 61688083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61688115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61688119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228340 + ... + 228609.

It is an arithmetic number, because the mean of its divisors is an integer number (6854250).

Almost surely, 2^61688115 is an apocalyptic number.

61688115 is a deficient number, since it is larger than the sum of its proper divisors (47979885).

61688115 is a wasteful number, since it uses less digits than its factorization.

61688115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456963 (or 456957 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 61688115 is about 7854.1781874363. The cubic root of 61688115 is about 395.1243853316.

The spelling of 61688115 in words is "sixty-one million, six hundred eighty-eight thousand, one hundred fifteen".