72745725735629 has 4 divisors (see below), whose sum is σ = 72745763760576. Its totient is φ = 72745687710684.

The previous prime is 72745725735589. The next prime is 72745725735677. The reversal of 72745725735629 is 92653752754727.

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 a de Polignac number, because none of the positive numbers 2^k-72745725735629 is a prime.

It is a super-2 number, since 2×72745725735629² (a number of 29 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 (72745725735689) 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, 15981779 + ... + 20022704.

It is an arithmetic number, because the mean of its divisors is an integer number (18186440940144).

Almost surely, 2^{72745725735629} is an apocalyptic number.

It is an amenable number.

72745725735629 is a deficient number, since it is larger than the sum of its proper divisors (38024947).

72745725735629 is a wasteful number, since it uses less digits than its factorization.

72745725735629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38024946.

The product of its digits is 1555848000, while the sum is 71.

The spelling of 72745725735629 in words is "seventy-two trillion, seven hundred forty-five billion, seven hundred twenty-five million, seven hundred thirty-five thousand, six hundred twenty-nine".