6481156500 has 1152 divisors, whose sum is σ = 28619136000. Its totient is φ = 1219276800.

The previous prime is 6481156489. The next prime is 6481156511. The reversal of 6481156500 is 56511846.

6481156500 is a `hidden beast` number, since 64 + 81 + 15 + 6 + 500 = 666.

It is an interprime number because it is at equal distance from previous prime (6481156489) and next prime (6481156511).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 341113491 + ... + 341113509.

It is an arithmetic number, because the mean of its divisors is an integer number (24843000).

Almost surely, 2^6481156500 is an apocalyptic number.

6481156500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6481156500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14309568000).

6481156500 is an abundant number, since it is smaller than the sum of its proper divisors (22137979500).

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

6481156500 is a wasteful number, since it uses less digits than its factorization.

6481156500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 6481156500 is about 80505.6302378908. The cubic root of 6481156500 is about 1864.4504079129.

The spelling of 6481156500 in words is "six billion, four hundred eighty-one million, one hundred fifty-six thousand, five hundred".