7922136690 has 256 divisors, whose sum is σ = 23410114560. Its totient is φ = 1894475520.

The previous prime is 7922136667. The next prime is 7922136709. The reversal of 7922136690 is 966312297.

It is a happy number.

It is a super-2 number, since 2×7922136690² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20684239 + ... + 20684621.

It is an arithmetic number, because the mean of its divisors is an integer number (91445760).

Almost surely, 2^7922136690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7922136690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11705057280).

7922136690 is an abundant number, since it is smaller than the sum of its proper divisors (15487977870).

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

7922136690 is a wasteful number, since it uses less digits than its factorization.

7922136690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 7922136690 is about 89006.3856697934. The cubic root of 7922136690 is about 1993.4902252384.

The spelling of 7922136690 in words is "seven billion, nine hundred twenty-two million, one hundred thirty-six thousand, six hundred ninety".