72628028783 has 4 divisors (see below), whose sum is σ = 72630472488. Its totient is φ = 72625585080.

The previous prime is 72628028777. The next prime is 72628028797. The reversal of 72628028783 is 38782082627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72628028783 is a prime.

It is a super-2 number, since 2×72628028783² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72628088783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176716 + ... + 1236897.

It is an arithmetic number, because the mean of its divisors is an integer number (18157618122).

Almost surely, 2^72628028783 is an apocalyptic number.

72628028783 is a deficient number, since it is larger than the sum of its proper divisors (2443705).

72628028783 is a wasteful number, since it uses less digits than its factorization.

72628028783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443704.

The product of its (nonzero) digits is 3612672, while the sum is 53.

The spelling of 72628028783 in words is "seventy-two billion, six hundred twenty-eight million, twenty-eight thousand, seven hundred eighty-three".