1138694391450 has 1008 divisors, whose sum is σ = 4071554760960. Its totient is φ = 236117851200.

The previous prime is 1138694391449. The next prime is 1138694391479. The reversal of 1138694391450 is 541934968311.

1138694391450 is a `hidden beast` number, since 1 + 1 + 3 + 8 + 69 + 43 + 91 + 450 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 503 ways as a sum of consecutive naturals, for example, 2377232311 + ... + 2377232789.

Almost surely, 2^{1138694391450} is an apocalyptic number.

1138694391450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138694391450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2035777380480).

1138694391450 is an abundant number, since it is smaller than the sum of its proper divisors (2932860369510).

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

1138694391450 is an equidigital number, since it uses as much as digits as its factorization.

1138694391450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 1138694391450 in words is "one trillion, one hundred thirty-eight billion, six hundred ninety-four million, three hundred ninety-one thousand, four hundred fifty".