263873422890 has 576 divisors, whose sum is σ = 893923430400. Its totient is φ = 52825893120.

The previous prime is 263873422889. The next prime is 263873422903. The reversal of 263873422890 is 98224378362.

263873422890 is a `hidden beast` number, since 2 + 6 + 387 + 34 + 228 + 9 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 258952801 + ... + 258953819.

It is an arithmetic number, because the mean of its divisors is an integer number (1551950400).

Almost surely, 2^263873422890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263873422890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (446961715200).

263873422890 is an abundant number, since it is smaller than the sum of its proper divisors (630050007510).

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

263873422890 is a wasteful number, since it uses less digits than its factorization.

263873422890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 263873422890 in words is "two hundred sixty-three billion, eight hundred seventy-three million, four hundred twenty-two thousand, eight hundred ninety".