11401868478 has 96 divisors (see below), whose sum is σ = 30849735168. Its totient is φ = 2733698880.

The previous prime is 11401868411. The next prime is 11401868501. The reversal of 11401868478 is 87486810411.

It is a super-2 number, since 2×11401868478² (a number of 21 digits) contains 22 as substring.

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, 20226 + ... + 152357.

It is an arithmetic number, because the mean of its divisors is an integer number (321351408).

Almost surely, 2^11401868478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11401868478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15424867584).

11401868478 is an abundant number, since it is smaller than the sum of its proper divisors (19447866690).

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

11401868478 is a wasteful number, since it uses less digits than its factorization.

11401868478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172630 (or 172619 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 48.

The spelling of 11401868478 in words is "eleven billion, four hundred one million, eight hundred sixty-eight thousand, four hundred seventy-eight".