5121691000 has 32 divisors (see below), whose sum is σ = 11984759280. Its totient is φ = 2048676000.

The previous prime is 5121690989. The next prime is 5121691061. The reversal of 5121691000 is 1961215.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2559846 + ... + 2561845.

Almost surely, 2^5121691000 is an apocalyptic number.

5121691000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5121691000 is an abundant number, since it is smaller than the sum of its proper divisors (6863068280).

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

5121691000 is a wasteful number, since it uses less digits than its factorization.

5121691000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5121712 (or 5121698 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 5121691000 is about 71565.9905262269. The cubic root of 5121691000 is about 1723.7374784868.

The spelling of 5121691000 in words is "five billion, one hundred twenty-one million, six hundred ninety-one thousand".