61329996 has 144 divisors (see below), whose sum is σ = 193770304. Its totient is φ = 15925248.

The previous prime is 61329977. The next prime is 61330019. The reversal of 61329996 is 69992316.

It is a happy number.

61329996 is a `hidden beast` number, since 613 + 29 + 9 + 9 + 6 = 666.

It is a super-2 number, since 2×61329996² = 7522736818720032, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 317676 + ... + 317868.

Almost surely, 2^61329996 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 61329996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96885152).

61329996 is an abundant number, since it is smaller than the sum of its proper divisors (132440308).

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

61329996 is a wasteful number, since it uses less digits than its factorization.

61329996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 315 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 61329996 is about 7831.3470105723. The cubic root of 61329996 is about 394.3582936422.

The spelling of 61329996 in words is "sixty-one million, three hundred twenty-nine thousand, nine hundred ninety-six".