9778135790690 has 16 divisors (see below), whose sum is σ = 17629930032120. Its totient is φ = 3904746403200.

The previous prime is 9778135790677. The next prime is 9778135790719. The reversal of 9778135790690 is 960975318779.

It can be written as a sum of positive squares in 4 ways, for example, as 8735210780521 + 1042925010169 = 2955539^2 + 1021237^2 .

It is a super-2 number, since 2×9778135790690² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813482825 + ... + 813494844.

Almost surely, 2^{9778135790690} is an apocalyptic number.

9778135790690 is a deficient number, since it is larger than the sum of its proper divisors (7851794241430).

9778135790690 is a wasteful number, since it uses less digits than its factorization.

9778135790690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626978277.

The product of its (nonzero) digits is 180033840, while the sum is 71.

The spelling of 9778135790690 in words is "nine trillion, seven hundred seventy-eight billion, one hundred thirty-five million, seven hundred ninety thousand, six hundred ninety".