72083537551 has 4 divisors (see below), whose sum is σ = 72119817112. Its totient is φ = 72047257992.

The previous prime is 72083537521. The next prime is 72083537563. The reversal of 72083537551 is 15573538027.

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 72083537551 - 2¹³ = 72083529359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72083537521) 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, 18136800 + ... + 18140773.

It is an arithmetic number, because the mean of its divisors is an integer number (18029954278).

Almost surely, 2^72083537551 is an apocalyptic number.

72083537551 is a deficient number, since it is larger than the sum of its proper divisors (36279561).

72083537551 is a wasteful number, since it uses less digits than its factorization.

72083537551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36279560.

The product of its (nonzero) digits is 882000, while the sum is 46.

The spelling of 72083537551 in words is "seventy-two billion, eighty-three million, five hundred thirty-seven thousand, five hundred fifty-one".