72552520451 has 4 divisors (see below), whose sum is σ = 73367717400. Its totient is φ = 71737323504.

The previous prime is 72552520427. The next prime is 72552520459. The reversal of 72552520451 is 15402525527.

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

It is a cyclic number.

It is not a de Polignac number, because 72552520451 - 2¹⁸ = 72552258307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72552520459) 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, 407598341 + ... + 407598518.

It is an arithmetic number, because the mean of its divisors is an integer number (18341929350).

Almost surely, 2^72552520451 is an apocalyptic number.

72552520451 is a deficient number, since it is larger than the sum of its proper divisors (815196949).

72552520451 is an equidigital number, since it uses as much as digits as its factorization.

72552520451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815196948.

The product of its (nonzero) digits is 140000, while the sum is 38.

The spelling of 72552520451 in words is "seventy-two billion, five hundred fifty-two million, five hundred twenty thousand, four hundred fifty-one".