9401278464 has 168 divisors, whose sum is σ = 28100449260. Its totient is φ = 3025010688.

The previous prime is 9401278433. The next prime is 9401278487. The reversal of 9401278464 is 4648721049.

It can be written as a sum of positive squares in 2 ways, for example, as 9401241600 + 36864 = 96960^2 + 192^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2135914 + ... + 2140310.

Almost surely, 2^9401278464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9401278464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14050224630).

9401278464 is an abundant number, since it is smaller than the sum of its proper divisors (18699170796).

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

9401278464 is a wasteful number, since it uses less digits than its factorization.

9401278464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4458 (or 4431 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 9401278464 is about 96960.1900988235. The cubic root of 9401278464 is about 2110.5499688705.

The spelling of 9401278464 in words is "nine billion, four hundred one million, two hundred seventy-eight thousand, four hundred sixty-four".