72065506620523 has 4 divisors (see below), whose sum is σ = 77609007129808. Its totient is φ = 66522006111240.

The previous prime is 72065506620491. The next prime is 72065506620529. The reversal of 72065506620523 is 32502660556027.

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 72065506620523 - 2⁵ = 72065506620491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72065506620529) 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, 2771750254623 + ... + 2771750254648.

It is an arithmetic number, because the mean of its divisors is an integer number (19402251782452).

Almost surely, 2^{72065506620523} is an apocalyptic number.

72065506620523 is a deficient number, since it is larger than the sum of its proper divisors (5543500509285).

72065506620523 is a wasteful number, since it uses less digits than its factorization.

72065506620523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5543500509284.

The product of its (nonzero) digits is 4536000, while the sum is 49.

The spelling of 72065506620523 in words is "seventy-two trillion, sixty-five billion, five hundred six million, six hundred twenty thousand, five hundred twenty-three".