721196056 has 32 divisors (see below), whose sum is σ = 1564992000. Its totient is φ = 305169696.

The previous prime is 721196051. The next prime is 721196057. The reversal of 721196056 is 650691127.

It is a super-3 number, since 3×721196056³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721196051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77086 + ... + 85933.

It is an arithmetic number, because the mean of its divisors is an integer number (48906000).

Almost surely, 2^721196056 is an apocalyptic number.

It is an amenable number.

721196056 is an abundant number, since it is smaller than the sum of its proper divisors (843795944).

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

721196056 is a wasteful number, since it uses less digits than its factorization.

721196056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163111 (or 163107 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 721196056 is about 26855.0936695443. The cubic root of 721196056 is about 896.7769720684.

The spelling of 721196056 in words is "seven hundred twenty-one million, one hundred ninety-six thousand, fifty-six".