7878922477802 has 32 divisors (see below), whose sum is σ = 12846843006480. Its totient is φ = 3609380229120.

The previous prime is 7878922477799. The next prime is 7878922477807. The reversal of 7878922477802 is 2087742298787.

It can be written as a sum of positive squares in 8 ways, for example, as 5041277787841 + 2837644689961 = 2245279^2 + 1684531^2 .

It is a super-2 number, since 2×7878922477802² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (7878922477807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5546777 + ... + 6820892.

Almost surely, 2^{7878922477802} is an apocalyptic number.

7878922477802 is a deficient number, since it is larger than the sum of its proper divisors (4967920528678).

7878922477802 is a wasteful number, since it uses less digits than its factorization.

7878922477802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12368186.

The product of its (nonzero) digits is 354041856, while the sum is 71.

The spelling of 7878922477802 in words is "seven trillion, eight hundred seventy-eight billion, nine hundred twenty-two million, four hundred seventy-seven thousand, eight hundred two".