78531208271061 has 32 divisors (see below), whose sum is σ = 129119081188608. Its totient is φ = 41343548014080.

The previous prime is 78531208271039. The next prime is 78531208271119. The reversal of 78531208271061 is 16017280213587.

It is not a de Polignac number, because 78531208271061 - 2¹¹ = 78531208269013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78531208270995 and 78531208271013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78531208231061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275923126 + ... + 276207591.

It is an arithmetic number, because the mean of its divisors is an integer number (4034971287144).

Almost surely, 2^{78531208271061} is an apocalyptic number.

It is an amenable number.

78531208271061 is a deficient number, since it is larger than the sum of its proper divisors (50587872917547).

78531208271061 is a wasteful number, since it uses less digits than its factorization.

78531208271061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552131261.

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 78531208271061 in words is "seventy-eight trillion, five hundred thirty-one billion, two hundred eight million, two hundred seventy-one thousand, sixty-one".