131778345780670 has 16 divisors (see below), whose sum is σ = 237201502911408. Its totient is φ = 52711231533120.

The previous prime is 131778345780617. The next prime is 131778345780701. The reversal of 131778345780670 is 76087543877131.

It is a junction number, because it is equal to n+sod(n) for n = 131778345780596 and 131778345780605.

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, 8064519 + ... + 18127138.

It is an arithmetic number, because the mean of its divisors is an integer number (14825093931963).

Almost surely, 2^{131778345780670} is an apocalyptic number.

131778345780670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131778345780670 is a deficient number, since it is larger than the sum of its proper divisors (105423157130738).

131778345780670 is a wasteful number, since it uses less digits than its factorization.

131778345780670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26694795.

The product of its (nonzero) digits is 165957120, while the sum is 67.

The spelling of 131778345780670 in words is "one hundred thirty-one trillion, seven hundred seventy-eight billion, three hundred forty-five million, seven hundred eighty thousand, six hundred seventy".