61615617 has 8 divisors (see below), whose sum is σ = 93890496. Its totient is φ = 35208912.

The previous prime is 61615573. The next prime is 61615663. The reversal of 61615617 is 71651616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61615617 - 2⁶ = 61615553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61615117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1467018 + ... + 1467059.

It is an arithmetic number, because the mean of its divisors is an integer number (11736312).

Almost surely, 2^61615617 is an apocalyptic number.

It is an amenable number.

61615617 is a deficient number, since it is larger than the sum of its proper divisors (32274879).

61615617 is a wasteful number, since it uses less digits than its factorization.

61615617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2934087.

The product of its digits is 7560, while the sum is 33.

The square root of 61615617 is about 7849.5615801139. The cubic root of 61615617 is about 394.9695367203.

The spelling of 61615617 in words is "sixty-one million, six hundred fifteen thousand, six hundred seventeen".