1873321260165 has 120 divisors (see below), whose sum is σ = 3607358542920. Its totient is φ = 929763090432.

The previous prime is 1873321260119. The next prime is 1873321260221. The reversal of 1873321260165 is 5610621233781.

It is a happy number.

1873321260165 is a `hidden beast` number, since 1 + 8 + 7 + 3 + 32 + 1 + 2 + 601 + 6 + 5 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 121896644769 + 1751424615396 = 349137^2 + 1323414^2 .

It is not a de Polignac number, because 1873321260165 - 2⁶ = 1873321260101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1873321260165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 10327089 + ... + 10506921.

It is an arithmetic number, because the mean of its divisors is an integer number (30061321191).

Almost surely, 2^{1873321260165} is an apocalyptic number.

1873321260165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1873321260165 is a deficient number, since it is larger than the sum of its proper divisors (1734037282755).

1873321260165 is a wasteful number, since it uses less digits than its factorization.

1873321260165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179973 (or 179947 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 1873321260165 in words is "one trillion, eight hundred seventy-three billion, three hundred twenty-one million, two hundred sixty thousand, one hundred sixty-five".