72743555020427 has 4 divisors (see below), whose sum is σ = 72743574207696. Its totient is φ = 72743535833160.

The previous prime is 72743555020351. The next prime is 72743555020429. The reversal of 72743555020427 is 72402055534727.

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 72743555020427 - 2¹⁰ = 72743555019403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72743555020429) 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, 1791968 + ... + 12194189.

It is an arithmetic number, because the mean of its divisors is an integer number (18185893551924).

Almost surely, 2^{72743555020427} is an apocalyptic number.

72743555020427 is a deficient number, since it is larger than the sum of its proper divisors (19187269).

72743555020427 is a wasteful number, since it uses less digits than its factorization.

72743555020427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19187268.

The product of its (nonzero) digits is 16464000, while the sum is 53.

The spelling of 72743555020427 in words is "seventy-two trillion, seven hundred forty-three billion, five hundred fifty-five million, twenty thousand, four hundred twenty-seven".