1851366532734 has 16 divisors (see below), whose sum is σ = 4114147850640. Its totient is φ = 617122177560.

The previous prime is 1851366532721. The next prime is 1851366532753. The reversal of 1851366532734 is 4372356631581.

1851366532734 is a `hidden beast` number, since 1 + 8 + 5 + 1 + 36 + 6 + 532 + 73 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 34284565421 = 1851366532734 / (1 + 8 + 5 + 1 + 3 + 6 + 6 + 5 + 3 + 2 + 7 + 3 + 4).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17142282657 + ... + 17142282764.

It is an arithmetic number, because the mean of its divisors is an integer number (257134240665).

Almost surely, 2^{1851366532734} is an apocalyptic number.

1851366532734 is an abundant number, since it is smaller than the sum of its proper divisors (2262781317906).

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

1851366532734 is a wasteful number, since it uses less digits than its factorization.

1851366532734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34284565432 (or 34284565426 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 1851366532734 in words is "one trillion, eight hundred fifty-one billion, three hundred sixty-six million, five hundred thirty-two thousand, seven hundred thirty-four".