245919878136 has 24 divisors (see below), whose sum is σ = 666033003480. Its totient is φ = 81973292688.

The previous prime is 245919878131. The next prime is 245919878143. The reversal of 245919878136 is 631878919542.

245919878136 is a `hidden beast` number, since 2 + 4 + 591 + 9 + 8 + 7 + 8 + 1 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245919878131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1707776860 + ... + 1707777003.

It is an arithmetic number, because the mean of its divisors is an integer number (27751375145).

Almost surely, 2^245919878136 is an apocalyptic number.

It is an amenable number.

245919878136 is an abundant number, since it is smaller than the sum of its proper divisors (420113125344).

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

245919878136 is a wasteful number, since it uses less digits than its factorization.

245919878136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3415553875 (or 3415553868 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 245919878136 in words is "two hundred forty-five billion, nine hundred nineteen million, eight hundred seventy-eight thousand, one hundred thirty-six".