1388770256450 has 24 divisors (see below), whose sum is σ = 2583147048960. Its totient is φ = 555500710800.

The previous prime is 1388770256347. The next prime is 1388770256453. The reversal of 1388770256450 is 546520778831.

It is a super-3 number, since 3×1388770256450³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1388770256453) 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, 5115635 + ... + 5380265.

It is an arithmetic number, because the mean of its divisors is an integer number (107631127040).

Almost surely, 2^{1388770256450} is an apocalyptic number.

1388770256450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388770256450 is a deficient number, since it is larger than the sum of its proper divisors (1194376792510).

1388770256450 is a wasteful number, since it uses less digits than its factorization.

1388770256450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369602 (or 369597 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 1388770256450 in words is "one trillion, three hundred eighty-eight billion, seven hundred seventy million, two hundred fifty-six thousand, four hundred fifty".