1227372726538 has 48 divisors (see below), whose sum is σ = 2177444998080. Its totient is φ = 508272468480.

The previous prime is 1227372726523. The next prime is 1227372726539. The reversal of 1227372726538 is 8356272737221.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1227372726539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8796970 + ... + 8935402.

It is an arithmetic number, because the mean of its divisors is an integer number (45363437460).

Almost surely, 2^{1227372726538} is an apocalyptic number.

1227372726538 is a deficient number, since it is larger than the sum of its proper divisors (950072271542).

1227372726538 is a wasteful number, since it uses less digits than its factorization.

1227372726538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139163 (or 139132 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 55.

The spelling of 1227372726538 in words is "one trillion, two hundred twenty-seven billion, three hundred seventy-two million, seven hundred twenty-six thousand, five hundred thirty-eight".