1861747474873 has 32 divisors (see below), whose sum is σ = 2234014876800. Its totient is φ = 1529117568000.

The previous prime is 1861747474861. The next prime is 1861747474879. The reversal of 1861747474873 is 3784747471681.

It is a de Polignac number, because none of the positive numbers 2^k-1861747474873 is a prime.

It is a super-2 number, since 2×1861747474873² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1861747474799 and 1861747474808.

It is not an unprimeable number, because it can be changed into a prime (1861747474879) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1450273 + ... + 2413873.

It is an arithmetic number, because the mean of its divisors is an integer number (69812964900).

Almost surely, 2^{1861747474873} is an apocalyptic number.

1861747474873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1861747474873 is a deficient number, since it is larger than the sum of its proper divisors (372267401927).

1861747474873 is a wasteful number, since it uses less digits than its factorization.

1861747474873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963913.

The product of its digits is 177020928, while the sum is 67.

The spelling of 1861747474873 in words is "one trillion, eight hundred sixty-one billion, seven hundred forty-seven million, four hundred seventy-four thousand, eight hundred seventy-three".