146831278781 has 8 divisors (see below), whose sum is σ = 160802846784. Its totient is φ = 132963589120.

The previous prime is 146831278757. The next prime is 146831278801. The reversal of 146831278781 is 187872138641.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146831278781 is a prime.

It is a super-2 number, since 2×146831278781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146831278751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25966625 + ... + 25972278.

It is an arithmetic number, because the mean of its divisors is an integer number (20100355848).

Almost surely, 2^146831278781 is an apocalyptic number.

146831278781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

146831278781 is a deficient number, since it is larger than the sum of its proper divisors (13971568003).

146831278781 is a wasteful number, since it uses less digits than its factorization.

146831278781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51939171.

The product of its digits is 3612672, while the sum is 56.

The spelling of 146831278781 in words is "one hundred forty-six billion, eight hundred thirty-one million, two hundred seventy-eight thousand, seven hundred eighty-one".