78531208271092 has 24 divisors (see below), whose sum is σ = 145514012772744. Its totient is φ = 36955785679872.

The previous prime is 78531208271039. The next prime is 78531208271119. The reversal of 78531208271092 is 29017280213587.

It can be written as a sum of positive squares in 4 ways, for example, as 9652728189456 + 68878480081636 = 3106884^2 + 8299306^2 .

It is a congruent number.

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, 44107488 + ... + 45853384.

It is an arithmetic number, because the mean of its divisors is an integer number (6063083865531).

Almost surely, 2^{78531208271092} is an apocalyptic number.

It is an amenable number.

78531208271092 is a deficient number, since it is larger than the sum of its proper divisors (66982804501652).

78531208271092 is a wasteful number, since it uses less digits than its factorization.

78531208271092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407395 (or 2407393 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 78531208271092 in words is "seventy-eight trillion, five hundred thirty-one billion, two hundred eight million, two hundred seventy-one thousand, ninety-two".