1388051188455 has 32 divisors (see below), whose sum is σ = 2232453639168. Its totient is φ = 736445001600.

The previous prime is 1388051188451. The next prime is 1388051188481. The reversal of 1388051188455 is 5548811508831.

It is not a de Polignac number, because 1388051188455 - 2² = 1388051188451 is a prime.

It is a super-2 number, since 2×1388051188455² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1388051188395 and 1388051188404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388051188451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2428672 + ... + 2945258.

It is an arithmetic number, because the mean of its divisors is an integer number (69764176224).

Almost surely, 2^{1388051188455} is an apocalyptic number.

1388051188455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1388051188455 is a deficient number, since it is larger than the sum of its proper divisors (844402450713).

1388051188455 is a wasteful number, since it uses less digits than its factorization.

1388051188455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517527.

The product of its (nonzero) digits is 6144000, while the sum is 57.

The spelling of 1388051188455 in words is "one trillion, three hundred eighty-eight billion, fifty-one million, one hundred eighty-eight thousand, four hundred fifty-five".