5401505538 has 96 divisors (see below), whose sum is σ = 13768634880. Its totient is φ = 1508785920.

The previous prime is 5401505537. The next prime is 5401505563. The reversal of 5401505538 is 8355051045.

It is a happy number.

5401505538 is a `hidden beast` number, since 54 + 0 + 1 + 50 + 553 + 8 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5401505537) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3069903 + ... + 3071661.

It is an arithmetic number, because the mean of its divisors is an integer number (143423280).

Almost surely, 2^5401505538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5401505538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6884317440).

5401505538 is an abundant number, since it is smaller than the sum of its proper divisors (8367129342).

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

5401505538 is a wasteful number, since it uses less digits than its factorization.

5401505538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984 (or 2981 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The square root of 5401505538 is about 73494.9354581661. The cubic root of 5401505538 is about 1754.5736729560.

The spelling of 5401505538 in words is "five billion, four hundred one million, five hundred five thousand, five hundred thirty-eight".