6525398880 has 960 divisors, whose sum is σ = 30981823488. Its totient is φ = 1249136640.

The previous prime is 6525398819. The next prime is 6525398903. The reversal of 6525398880 is 888935256.

6525398880 is a `hidden beast` number, since 6 + 525 + 39 + 8 + 8 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 12972709 + ... + 12973211.

Almost surely, 2^6525398880 is an apocalyptic number.

6525398880 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 6525398880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15490911744).

6525398880 is an abundant number, since it is smaller than the sum of its proper divisors (24456424608).

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

6525398880 is a wasteful number, since it uses less digits than its factorization.

6525398880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The square root of 6525398880 is about 80779.9410745019. The cubic root of 6525398880 is about 1868.6832294499.

The spelling of 6525398880 in words is "six billion, five hundred twenty-five million, three hundred ninety-eight thousand, eight hundred eighty".