61690615 has 8 divisors (see below), whose sum is σ = 84604320. Its totient is φ = 42302112.

The previous prime is 61690613. The next prime is 61690639. The reversal of 61690615 is 51609616.

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

It is a cyclic number.

It is not a de Polignac number, because 61690615 - 2¹ = 61690613 is a prime.

It is a super-3 number, since 3×61690615³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61690613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881260 + ... + 881329.

It is an arithmetic number, because the mean of its divisors is an integer number (10575540).

Almost surely, 2^61690615 is an apocalyptic number.

61690615 is a deficient number, since it is larger than the sum of its proper divisors (22913705).

61690615 is a wasteful number, since it uses less digits than its factorization.

61690615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762601.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 61690615 is about 7854.3373367841. The cubic root of 61690615 is about 395.1297229217.

The spelling of 61690615 in words is "sixty-one million, six hundred ninety thousand, six hundred fifteen".