1256164186042 has 8 divisors (see below), whose sum is σ = 1901856057696. Its totient is φ = 622212166812.

The previous prime is 1256164186019. The next prime is 1256164186111. The reversal of 1256164186042 is 2406814616521.

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

It is a junction number, because it is equal to n+sod(n) for n = 1256164185983 and 1256164186001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2934962838 + ... + 2934963265.

It is an arithmetic number, because the mean of its divisors is an integer number (237732007212).

Almost surely, 2^{1256164186042} is an apocalyptic number.

1256164186042 is a deficient number, since it is larger than the sum of its proper divisors (645691871654).

1256164186042 is a wasteful number, since it uses less digits than its factorization.

1256164186042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869926212.

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 1256164186042 in words is "one trillion, two hundred fifty-six billion, one hundred sixty-four million, one hundred eighty-six thousand, forty-two".