1861214697504 has 36 divisors (see below), whose sum is σ = 5292829296846. Its totient is φ = 620404899072.

The previous prime is 1861214697467. The next prime is 1861214697509. The reversal of 1861214697504 is 4057964121681.

1861214697504 is a `hidden beast` number, since 1 + 8 + 6 + 1 + 2 + 1 + 46 + 97 + 504 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1001240384400 + 859974313104 = 1000620^2 + 927348^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1861214697509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3231275229 + ... + 3231275804.

Almost surely, 2^{1861214697504} is an apocalyptic number.

It is an amenable number.

1861214697504 is an abundant number, since it is smaller than the sum of its proper divisors (3431614599342).

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

1861214697504 is a wasteful number, since it uses less digits than its factorization.

1861214697504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6462551049 (or 6462551038 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 1861214697504 in words is "one trillion, eight hundred sixty-one billion, two hundred fourteen million, six hundred ninety-seven thousand, five hundred four".