72526643 has 4 divisors (see below), whose sum is σ = 82887600. Its totient is φ = 62165688.

The previous prime is 72526637. The next prime is 72526673. The reversal of 72526643 is 34662527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34662527 = 359 ⋅96553.

It is a cyclic number.

It is not a de Polignac number, because 72526643 - 2⁶ = 72526579 is a prime.

It is a super-2 number, since 2×72526643² = 10520227889698898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72526603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5180468 + ... + 5180481.

It is an arithmetic number, because the mean of its divisors is an integer number (20721900).

Almost surely, 2^72526643 is an apocalyptic number.

72526643 is a deficient number, since it is larger than the sum of its proper divisors (10360957).

72526643 is a wasteful number, since it uses less digits than its factorization.

72526643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10360956.

The product of its digits is 60480, while the sum is 35.

The square root of 72526643 is about 8516.2575700832. The cubic root of 72526643 is about 417.0286178260.

The spelling of 72526643 in words is "seventy-two million, five hundred twenty-six thousand, six hundred forty-three".