1500440381685 has 48 divisors (see below), whose sum is σ = 3068181642240. Its totient is φ = 663789288960.

The previous prime is 1500440381683. The next prime is 1500440381689. The reversal of 1500440381685 is 5861830440051.

1500440381685 is a `hidden beast` number, since 1 + 50 + 0 + 440 + 3 + 81 + 6 + 85 = 666.

It is not a de Polignac number, because 1500440381685 - 2¹ = 1500440381683 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 1500440381685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1500440381681) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 76817700 + ... + 76837229.

It is an arithmetic number, because the mean of its divisors is an integer number (63920450880).

Almost surely, 2^{1500440381685} is an apocalyptic number.

1500440381685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1500440381685 is an abundant number, since it is smaller than the sum of its proper divisors (1567741260555).

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

1500440381685 is a wasteful number, since it uses less digits than its factorization.

1500440381685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153654978 (or 153654975 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 1500440381685 in words is "one trillion, five hundred billion, four hundred forty million, three hundred eighty-one thousand, six hundred eighty-five".