6899137920 has 96 divisors (see below), whose sum is σ = 23823605520. Its totient is φ = 1839768576.

The previous prime is 6899137879. The next prime is 6899137963. The reversal of 6899137920 is 297319986.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 593124 + ... + 604643.

Almost surely, 2^6899137920 is an apocalyptic number.

6899137920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6899137920 is an abundant number, since it is smaller than the sum of its proper divisors (16924467600).

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

6899137920 is a wasteful number, since it uses less digits than its factorization.

6899137920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197792 (or 1197777 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 6899137920 is about 83061.0493552784. The cubic root of 6899137920 is about 1903.6989731943.

The spelling of 6899137920 in words is "six billion, eight hundred ninety-nine million, one hundred thirty-seven thousand, nine hundred twenty".