6991622050 has 48 divisors (see below), whose sum is σ = 15071571072. Its totient is φ = 2363356800.

The previous prime is 6991622003. The next prime is 6991622051. The reversal of 6991622050 is 502261996.

It is a junction number, because it is equal to n+sod(n) for n = 6991621994 and 6991622012.

It is not an unprimeable number, because it can be changed into a prime (6991622051) 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, 115827 + ... + 165526.

It is an arithmetic number, because the mean of its divisors is an integer number (313991064).

Almost surely, 2^6991622050 is an apocalyptic number.

6991622050 is an abundant number, since it is smaller than the sum of its proper divisors (8079949022).

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

6991622050 is a wasteful number, since it uses less digits than its factorization.

6991622050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281443 (or 281438 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 6991622050 is about 83615.9198358781. The cubic root of 6991622050 is about 1912.1677142102.

The spelling of 6991622050 in words is "six billion, nine hundred ninety-one million, six hundred twenty-two thousand, fifty".