1257361807854 has 16 divisors (see below), whose sum is σ = 2515045408848. Its totient is φ = 419066970432.

The previous prime is 1257361807837. The next prime is 1257361807873. The reversal of 1257361807854 is 4587081637521.

It is a junction number, because it is equal to n+sod(n) for n = 1257361807794 and 1257361807803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13357237 + ... + 13451040.

It is an arithmetic number, because the mean of its divisors is an integer number (157190338053).

Almost surely, 2^{1257361807854} is an apocalyptic number.

1257361807854 is an abundant number, since it is smaller than the sum of its proper divisors (1257683600994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257361807854 is a wasteful number, since it uses less digits than its factorization.

1257361807854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26816099.

The product of its (nonzero) digits is 11289600, while the sum is 57.

The spelling of 1257361807854 in words is "one trillion, two hundred fifty-seven billion, three hundred sixty-one million, eight hundred seven thousand, eight hundred fifty-four".