61533996 has 24 divisors (see below), whose sum is σ = 145603584. Its totient is φ = 20222160.

The previous prime is 61533973. The next prime is 61534003. The reversal of 61533996 is 69933516.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35260 + ... + 36963.

It is an arithmetic number, because the mean of its divisors is an integer number (6066816).

Almost surely, 2^61533996 is an apocalyptic number.

It is an amenable number.

61533996 is an abundant number, since it is smaller than the sum of its proper divisors (84069588).

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

61533996 is a wasteful number, since it uses less digits than its factorization.

61533996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72301 (or 72299 counting only the distinct ones).

The product of its digits is 131220, while the sum is 42.

The square root of 61533996 is about 7844.3607770168. The cubic root of 61533996 is about 394.7950568533.

The spelling of 61533996 in words is "sixty-one million, five hundred thirty-three thousand, nine hundred ninety-six".