1855294616464 has 45 divisors (see below), whose sum is σ = 3612828562257. Its totient is φ = 922975332672.

The previous prime is 1855294616437. The next prime is 1855294616467. The reversal of 1855294616464 is 4646164925581.

The square root of 1855294616464 is 1362092.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1727931282064 + 127363334400 = 1314508^2 + 356880^2 .

It is a super-2 number, since 2×1855294616464² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1855294616467) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1247675529 + ... + 1247677015.

Almost surely, 2^{1855294616464} is an apocalyptic number.

1855294616464 is the 1362092-nd square number.

It is an amenable number.

1855294616464 is a deficient number, since it is larger than the sum of its proper divisors (1757533945793).

1855294616464 is an frugal number, since it uses more digits than its factorization.

1855294616464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440 (or 1718 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 61.

The spelling of 1855294616464 in words is "one trillion, eight hundred fifty-five billion, two hundred ninety-four million, six hundred sixteen thousand, four hundred sixty-four".