245495138868 has 144 divisors (see below), whose sum is σ = 749112139776. Its totient is φ = 66300171840.

The previous prime is 245495138797. The next prime is 245495138897. The reversal of 245495138868 is 868831594542.

245495138868 is a `hidden beast` number, since 2 + 4 + 5 + 495 + 1 + 3 + 88 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29496 + ... + 701327.

Almost surely, 2^245495138868 is an apocalyptic number.

245495138868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245495138868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374556069888).

245495138868 is an abundant number, since it is smaller than the sum of its proper divisors (503617000908).

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

245495138868 is a wasteful number, since it uses less digits than its factorization.

245495138868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730914 (or 730909 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 63.

The spelling of 245495138868 in words is "two hundred forty-five billion, four hundred ninety-five million, one hundred thirty-eight thousand, eight hundred sixty-eight".