1855387114538 has 4 divisors (see below), whose sum is σ = 2783080671810. Its totient is φ = 927693557268.

The previous prime is 1855387114519. The next prime is 1855387114541. The reversal of 1855387114538 is 8354117835581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1855106652529 + 280462009 = 1362023^2 + 16747^2 .

It is a super-2 number, since 2×1855387114538² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 463846778633 + ... + 463846778636.

Almost surely, 2^{1855387114538} is an apocalyptic number.

1855387114538 is a deficient number, since it is larger than the sum of its proper divisors (927693557272).

1855387114538 is an equidigital number, since it uses as much as digits as its factorization.

1855387114538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927693557271.

The product of its digits is 16128000, while the sum is 59.

The spelling of 1855387114538 in words is "one trillion, eight hundred fifty-five billion, three hundred eighty-seven million, one hundred fourteen thousand, five hundred thirty-eight".