263898946674 has 128 divisors (see below), whose sum is σ = 678732595200. Its totient is φ = 75163515840.

The previous prime is 263898946673. The next prime is 263898946687. The reversal of 263898946674 is 476649898362.

263898946674 is a `hidden beast` number, since 2 + 6 + 3 + 8 + 98 + 9 + 466 + 74 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (263898946673) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1341264 + ... + 1525380.

It is an arithmetic number, because the mean of its divisors is an integer number (5302598400).

Almost surely, 2^263898946674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263898946674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339366297600).

263898946674 is an abundant number, since it is smaller than the sum of its proper divisors (414833648526).

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

263898946674 is a wasteful number, since it uses less digits than its factorization.

263898946674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184285 (or 184279 counting only the distinct ones).

The product of its digits is 752467968, while the sum is 72.

The spelling of 263898946674 in words is "two hundred sixty-three billion, eight hundred ninety-eight million, nine hundred forty-six thousand, six hundred seventy-four".