1861237432704 has 512 divisors, whose sum is σ = 5658663628800. Its totient is φ = 537948979200.

The previous prime is 1861237432643. The next prime is 1861237432723. The reversal of 1861237432704 is 4072347321681.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1478345227 + ... + 1478346485.

It is an arithmetic number, because the mean of its divisors is an integer number (11052077400).

Almost surely, 2^{1861237432704} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1861237432704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2829331814400).

1861237432704 is an abundant number, since it is smaller than the sum of its proper divisors (3797426196096).

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

1861237432704 is a wasteful number, since it uses less digits than its factorization.

1861237432704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 1861237432704 in words is "one trillion, eight hundred sixty-one billion, two hundred thirty-seven million, four hundred thirty-two thousand, seven hundred four".