72420356243 has 16 divisors (see below), whose sum is σ = 80127083520. Its totient is φ = 65146694976.

The previous prime is 72420356237. The next prime is 72420356287. The reversal of 72420356243 is 34265302427.

It is a cyclic number.

It is not a de Polignac number, because 72420356243 - 2¹⁶ = 72420290707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72420356197 and 72420356206.

It is not an unprimeable number, because it can be changed into a prime (72420352243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544955 + ... + 664692.

It is an arithmetic number, because the mean of its divisors is an integer number (5007942720).

Almost surely, 2^72420356243 is an apocalyptic number.

72420356243 is a deficient number, since it is larger than the sum of its proper divisors (7706727277).

72420356243 is a wasteful number, since it uses less digits than its factorization.

72420356243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209826.

The product of its (nonzero) digits is 241920, while the sum is 38.

The spelling of 72420356243 in words is "seventy-two billion, four hundred twenty million, three hundred fifty-six thousand, two hundred forty-three".