7926921885 has 64 divisors (see below), whose sum is σ = 13507200000. Its totient is φ = 3958502400.

The previous prime is 7926921881. The next prime is 7926921887. The reversal of 7926921885 is 5881296297.

It is a happy number.

It is not a de Polignac number, because 7926921885 - 2² = 7926921881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7926921881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15885366 + ... + 15885864.

It is an arithmetic number, because the mean of its divisors is an integer number (211050000).

Almost surely, 2^7926921885 is an apocalyptic number.

It is an amenable number.

7926921885 is a deficient number, since it is larger than the sum of its proper divisors (5580278115).

7926921885 is a wasteful number, since it uses less digits than its factorization.

7926921885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066.

The product of its digits is 4354560, while the sum is 57.

The square root of 7926921885 is about 89033.2628010453. The cubic root of 7926921885 is about 1993.8915193092.

The spelling of 7926921885 in words is "seven billion, nine hundred twenty-six million, nine hundred twenty-one thousand, eight hundred eighty-five".