838245578640 has 40 divisors (see below), whose sum is σ = 2598561294528. Its totient is φ = 223532154240.

The previous prime is 838245578627. The next prime is 838245578657. The reversal of 838245578640 is 46875542838.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1746344716 + ... + 1746345195.

Almost surely, 2^838245578640 is an apocalyptic number.

838245578640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

838245578640 is an abundant number, since it is smaller than the sum of its proper divisors (1760315715888).

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

838245578640 is a wasteful number, since it uses less digits than its factorization.

838245578640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492689927 (or 3492689921 counting only the distinct ones).

The product of its (nonzero) digits is 51609600, while the sum is 60.

The spelling of 838245578640 in words is "eight hundred thirty-eight billion, two hundred forty-five million, five hundred seventy-eight thousand, six hundred forty".