5157129640 has 96 divisors (see below), whose sum is σ = 12665825280. Its totient is φ = 1888862976.

The previous prime is 5157129623. The next prime is 5157129683. The reversal of 5157129640 is 469217515.

It is a super-2 number, since 2×5157129640² = 53191972247533059200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 5157129593 and 5157129602.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 855517 + ... + 861523.

It is an arithmetic number, because the mean of its divisors is an integer number (131935680).

Almost surely, 2^5157129640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5157129640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6332912640).

5157129640 is an abundant number, since it is smaller than the sum of its proper divisors (7508695640).

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

5157129640 is a wasteful number, since it uses less digits than its factorization.

5157129640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6171 (or 6154 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 5157129640 is about 71813.1578472915. The cubic root of 5157129640 is about 1727.7040432855.

The spelling of 5157129640 in words is "five billion, one hundred fifty-seven million, one hundred twenty-nine thousand, six hundred forty".