1038658121388 has 36 divisors (see below), whose sum is σ = 2739648960048. Its totient is φ = 331166357280.

The previous prime is 1038658121387. The next prime is 1038658121399. The reversal of 1038658121388 is 8831218568301.

1038658121388 is a `hidden beast` number, since 1 + 0 + 3 + 8 + 6 + 581 + 21 + 38 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1038658121387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 627208183 + ... + 627209838.

Almost surely, 2^{1038658121388} is an apocalyptic number.

1038658121388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1038658121388 is an abundant number, since it is smaller than the sum of its proper divisors (1700990838660).

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

1038658121388 is a wasteful number, since it uses less digits than its factorization.

1038658121388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254418054 (or 1254418049 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 1038658121388 in words is "one trillion, thirty-eight billion, six hundred fifty-eight million, one hundred twenty-one thousand, three hundred eighty-eight".