10525139388 has 72 divisors (see below), whose sum is σ = 27922815648. Its totient is φ = 3336398208.

The previous prime is 10525139381. The next prime is 10525139407. The reversal of 10525139388 is 88393152501.

10525139388 is a `hidden beast` number, since 1 + 0 + 5 + 251 + 393 + 8 + 8 = 666.

It is a super-2 number, since 2×10525139388² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10525139381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106506 + ... + 179982.

It is an arithmetic number, because the mean of its divisors is an integer number (387816884).

Almost surely, 2^10525139388 is an apocalyptic number.

10525139388 is a gapful number since it is divisible by the number (18) 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 10525139388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13961407824).

10525139388 is an abundant number, since it is smaller than the sum of its proper divisors (17397676260).

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

10525139388 is a wasteful number, since it uses less digits than its factorization.

10525139388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73683 (or 73678 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 10525139388 in words is "ten billion, five hundred twenty-five million, one hundred thirty-nine thousand, three hundred eighty-eight".