1338520645245 has 32 divisors (see below), whose sum is σ = 2447738581248. Its totient is φ = 611855659008.

The previous prime is 1338520645237. The next prime is 1338520645249. The reversal of 1338520645245 is 5425460258331.

It is not a de Polignac number, because 1338520645245 - 2³ = 1338520645237 is a prime.

It is a super-2 number, since 2×1338520645245² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1338520645194 and 1338520645203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338520645249) 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, 1255197 + ... + 2062173.

It is an arithmetic number, because the mean of its divisors is an integer number (76491830664).

Almost surely, 2^{1338520645245} is an apocalyptic number.

1338520645245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1338520645245 is a deficient number, since it is larger than the sum of its proper divisors (1109217936003).

1338520645245 is a wasteful number, since it uses less digits than its factorization.

1338520645245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822789.

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 1338520645245 in words is "one trillion, three hundred thirty-eight billion, five hundred twenty million, six hundred forty-five thousand, two hundred forty-five".