72401178643 has 8 divisors (see below), whose sum is σ = 75469513680. Its totient is φ = 69370959840.

The previous prime is 72401178601. The next prime is 72401178721. The reversal of 72401178643 is 34687110427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72401178643 - 2²⁹ = 71864307731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72401178643.

It is not an unprimeable number, because it can be changed into a prime (72401178043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9525180 + ... + 9532777.

It is an arithmetic number, because the mean of its divisors is an integer number (9433689210).

Almost surely, 2^72401178643 is an apocalyptic number.

72401178643 is a deficient number, since it is larger than the sum of its proper divisors (3068335037).

72401178643 is a wasteful number, since it uses less digits than its factorization.

72401178643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19058117.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 72401178643 in words is "seventy-two billion, four hundred one million, one hundred seventy-eight thousand, six hundred forty-three".