1138451556138 has 16 divisors (see below), whose sum is σ = 2452049505696. Its totient is φ = 350292786480.

The previous prime is 1138451556113. The next prime is 1138451556139. The reversal of 1138451556138 is 8316551548311.

It is not an unprimeable number, because it can be changed into a prime (1138451556139) 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, 7297766308 + ... + 7297766463.

It is an arithmetic number, because the mean of its divisors is an integer number (153253094106).

Almost surely, 2^{1138451556138} is an apocalyptic number.

1138451556138 is an abundant number, since it is smaller than the sum of its proper divisors (1313597949558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1138451556138 is a wasteful number, since it uses less digits than its factorization.

1138451556138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14595532789.

The product of its digits is 1728000, while the sum is 51.

The spelling of 1138451556138 in words is "one trillion, one hundred thirty-eight billion, four hundred fifty-one million, five hundred fifty-six thousand, one hundred thirty-eight".