1861874457429 has 32 divisors (see below), whose sum is σ = 2911649388544. Its totient is φ = 1036326674880.

The previous prime is 1861874457403. The next prime is 1861874457431. The reversal of 1861874457429 is 9247544781681.

It is not a de Polignac number, because 1861874457429 - 2⁹ = 1861874456917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1861874457429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861874457829) 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, 6923659 + ... + 7187544.

It is an arithmetic number, because the mean of its divisors is an integer number (90989043392).

Almost surely, 2^{1861874457429} is an apocalyptic number.

It is an amenable number.

1861874457429 is a deficient number, since it is larger than the sum of its proper divisors (1049774931115).

1861874457429 is a wasteful number, since it uses less digits than its factorization.

1861874457429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14111377.

The product of its digits is 108380160, while the sum is 66.

The spelling of 1861874457429 in words is "one trillion, eight hundred sixty-one billion, eight hundred seventy-four million, four hundred fifty-seven thousand, four hundred twenty-nine".