72278681404 has 6 divisors (see below), whose sum is σ = 126487692464. Its totient is φ = 36139340700.

The previous prime is 72278681401. The next prime is 72278681407. The reversal of 72278681404 is 40418687227.

It is an interprime number because it is at equal distance from previous prime (72278681401) and next prime (72278681407).

It is a super-2 number, since 2×72278681404² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72278681401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9034835172 + ... + 9034835179.

Almost surely, 2^72278681404 is an apocalyptic number.

It is an amenable number.

72278681404 is a deficient number, since it is larger than the sum of its proper divisors (54209011060).

72278681404 is a wasteful number, since it uses less digits than its factorization.

72278681404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18069670355 (or 18069670353 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 49.

The spelling of 72278681404 in words is "seventy-two billion, two hundred seventy-eight million, six hundred eighty-one thousand, four hundred four".