61699616 has 48 divisors (see below), whose sum is σ = 138293568. Its totient is φ = 26822400.

The previous prime is 61699607. The next prime is 61699619.

61699616 is nontrivially palindromic in base 10.

61699616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61699616² = 7613685229094912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (61699619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4286 + ... + 11906.

It is an arithmetic number, because the mean of its divisors is an integer number (2881116).

Almost surely, 2^61699616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61699616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69146784).

61699616 is an abundant number, since it is smaller than the sum of its proper divisors (76593952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61699616 is a wasteful number, since it uses less digits than its factorization.

61699616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7665 (or 7657 counting only the distinct ones).

The product of its digits is 104976, while the sum is 44.

The square root of 61699616 is about 7854.9103113912. The cubic root of 61699616 is about 395.1489391871.

The spelling of 61699616 in words is "sixty-one million, six hundred ninety-nine thousand, six hundred sixteen".