245378136393 has 12 divisors (see below), whose sum is σ = 381699323460. Its totient is φ = 151001930016.

The previous prime is 245378136379. The next prime is 245378136403. The reversal of 245378136393 is 393631873542.

245378136393 is a `hidden beast` number, since 2 + 4 + 53 + 78 + 136 + 393 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 44290465209 + 201087671184 = 210453^2 + 448428^2 .

It is not a de Polignac number, because 245378136393 - 2¹² = 245378132297 is a prime.

It is a super-2 number, since 2×245378136393² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (245378136793) 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, 1048624398 + ... + 1048624631.

It is an arithmetic number, because the mean of its divisors is an integer number (31808276955).

Almost surely, 2^245378136393 is an apocalyptic number.

It is an amenable number.

245378136393 is a deficient number, since it is larger than the sum of its proper divisors (136321187067).

245378136393 is a wasteful number, since it uses less digits than its factorization.

245378136393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097249048 (or 2097249045 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 54.

The spelling of 245378136393 in words is "two hundred forty-five billion, three hundred seventy-eight million, one hundred thirty-six thousand, three hundred ninety-three".