1781360004 has 12 divisors (see below), whose sum is σ = 4156506704. Its totient is φ = 593786664.

The previous prime is 1781359973. The next prime is 1781360059. The reversal of 1781360004 is 4000631871.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74223322 + ... + 74223345.

Almost surely, 2^1781360004 is an apocalyptic number.

It is an amenable number.

1781360004 is an abundant number, since it is smaller than the sum of its proper divisors (2375146700).

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

1781360004 is a wasteful number, since it uses less digits than its factorization.

1781360004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148446674 (or 148446672 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1781360004 is about 42206.1607351344. The cubic root of 1781360004 is about 1212.2268497816.

Adding to 1781360004 its reverse (4000631871), we get a palindrome (5781991875).

The spelling of 1781360004 in words is "one billion, seven hundred eighty-one million, three hundred sixty thousand, four".