7725071620 has 96 divisors (see below), whose sum is σ = 19243929600. Its totient is φ = 2548675584.

The previous prime is 7725071597. The next prime is 7725071681. The reversal of 7725071620 is 261705277.

It is a self number, because there is not a number n which added to its sum of digits gives 7725071620.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1267741 + ... + 1273819.

It is an arithmetic number, because the mean of its divisors is an integer number (200457600).

Almost surely, 2^7725071620 is an apocalyptic number.

7725071620 is a gapful number since it is divisible by the number (70) 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 7725071620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9621964800).

7725071620 is an abundant number, since it is smaller than the sum of its proper divisors (11518857980).

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

7725071620 is a wasteful number, since it uses less digits than its factorization.

7725071620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6437 (or 6435 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 7725071620 is about 87892.3865872352. The cubic root of 7725071620 is about 1976.8217230833.

Adding to 7725071620 its reverse (261705277), we get a palindrome (7986776897).

The spelling of 7725071620 in words is "seven billion, seven hundred twenty-five million, seventy-one thousand, six hundred twenty".