6990515136 has 392 divisors, whose sum is σ = 23206978224. Its totient is φ = 2070282240.

The previous prime is 6990515123. The next prime is 6990515153. The reversal of 6990515136 is 6315150996.

It is a junction number, because it is equal to n+sod(n) for n = 6990515091 and 6990515100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 27200320 + ... + 27200576.

Almost surely, 2^6990515136 is an apocalyptic number.

6990515136 is a gapful number since it is divisible by the number (66) 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 6990515136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11603489112).

6990515136 is an abundant number, since it is smaller than the sum of its proper divisors (16216463088).

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

6990515136 is a wasteful number, since it uses less digits than its factorization.

6990515136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 6990515136 is about 83609.3005352873. The cubic root of 6990515136 is about 1912.0667973839.

The spelling of 6990515136 in words is "six billion, nine hundred ninety million, five hundred fifteen thousand, one hundred thirty-six".