65172996 has 36 divisors (see below), whose sum is σ = 188278272. Its totient is φ = 18620784.

The previous prime is 65172979. The next prime is 65173001. The reversal of 65172996 is 69927156.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129060 + ... + 129563.

It is an arithmetic number, because the mean of its divisors is an integer number (5229952).

Almost surely, 2^65172996 is an apocalyptic number.

It is an amenable number.

65172996 is an abundant number, since it is smaller than the sum of its proper divisors (123105276).

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

65172996 is a wasteful number, since it uses less digits than its factorization.

65172996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258640 (or 258635 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 65172996 is about 8072.9793756704. The cubic root of 65172996 is about 402.4289621684.

The spelling of 65172996 in words is "sixty-five million, one hundred seventy-two thousand, nine hundred ninety-six".