5181369520 has 20 divisors (see below), whose sum is σ = 12046684320. Its totient is φ = 2072547776.

The previous prime is 5181369493. The next prime is 5181369533. The reversal of 5181369520 is 259631815.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32383480 + ... + 32383639.

It is an arithmetic number, because the mean of its divisors is an integer number (602334216).

Almost surely, 2^5181369520 is an apocalyptic number.

It is an amenable number.

5181369520 is an abundant number, since it is smaller than the sum of its proper divisors (6865314800).

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

5181369520 is a wasteful number, since it uses less digits than its factorization.

5181369520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64767132 (or 64767126 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 5181369520 is about 71981.7304598882. The cubic root of 5181369520 is about 1730.4067026930.

The spelling of 5181369520 in words is "five billion, one hundred eighty-one million, three hundred sixty-nine thousand, five hundred twenty".