72261869945 has 8 divisors (see below), whose sum is σ = 86773686720. Its totient is φ = 57769867440.

The previous prime is 72261869941. The next prime is 72261869969. The reversal of 72261869945 is 54996816227.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72261869945 - 2² = 72261869941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72261869941) 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, 4945541 + ... + 4960130.

It is an arithmetic number, because the mean of its divisors is an integer number (10846710840).

Almost surely, 2^72261869945 is an apocalyptic number.

It is an amenable number.

72261869945 is a deficient number, since it is larger than the sum of its proper divisors (14511816775).

72261869945 is a wasteful number, since it uses less digits than its factorization.

72261869945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9907135.

The product of its digits is 13063680, while the sum is 59.

The spelling of 72261869945 in words is "seventy-two billion, two hundred sixty-one million, eight hundred sixty-nine thousand, nine hundred forty-five".