61600615 has 4 divisors (see below), whose sum is σ = 73920744. Its totient is φ = 49280488.

The previous prime is 61600589. The next prime is 61600619. The reversal of 61600615 is 51600616.

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

It is a cyclic number.

It is not a de Polignac number, because 61600615 - 2¹¹ = 61598567 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61600615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61600619) 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, 6160057 + ... + 6160066.

It is an arithmetic number, because the mean of its divisors is an integer number (18480186).

Almost surely, 2^61600615 is an apocalyptic number.

61600615 is a deficient number, since it is larger than the sum of its proper divisors (12320129).

61600615 is a wasteful number, since it uses less digits than its factorization.

61600615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12320128.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 61600615 is about 7848.6059271695. The cubic root of 61600615 is about 394.9374787549.

Subtracting from 61600615 its reverse (51600616), we obtain a palindrome (9999999).

The spelling of 61600615 in words is "sixty-one million, six hundred thousand, six hundred fifteen".