72571971225001 has 4 divisors (see below), whose sum is σ = 72805321615104. Its totient is φ = 72338620834900.

The previous prime is 72571971224983. The next prime is 72571971225073. The reversal of 72571971225001 is 10052217917527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72571971225001 - 2¹⁵ = 72571971192233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72571971205001) 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, 116675194585 + ... + 116675195206.

It is an arithmetic number, because the mean of its divisors is an integer number (18201330403776).

Almost surely, 2^{72571971225001} is an apocalyptic number.

It is an amenable number.

72571971225001 is a deficient number, since it is larger than the sum of its proper divisors (233350390103).

72571971225001 is a wasteful number, since it uses less digits than its factorization.

72571971225001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233350390102.

The product of its (nonzero) digits is 617400, while the sum is 49.

The spelling of 72571971225001 in words is "seventy-two trillion, five hundred seventy-one billion, nine hundred seventy-one million, two hundred twenty-five thousand, one".