7861801935990 has 32 divisors (see below), whose sum is σ = 18868533255936. Its totient is φ = 2096457337440.

The previous prime is 7861801935983. The next prime is 7861801936039. The reversal of 7861801935990 is 995391081687.

It is a super-2 number, since 2×7861801935990² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1401945 + ... + 4205835.

It is an arithmetic number, because the mean of its divisors is an integer number (589641664248).

Almost surely, 2^{7861801935990} is an apocalyptic number.

It is a pronic number, being equal to 2803890×2803891.

7861801935990 is an abundant number, since it is smaller than the sum of its proper divisors (11006731319946).

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

7861801935990 is a wasteful number, since it uses less digits than its factorization.

7861801935990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897364.

The product of its (nonzero) digits is 29393280, while the sum is 66.

The spelling of 7861801935990 in words is "seven trillion, eight hundred sixty-one billion, eight hundred one million, nine hundred thirty-five thousand, nine hundred ninety".