1994540639755 has 16 divisors (see below), whose sum is σ = 2519789289120. Its totient is φ = 1511430133248.

The previous prime is 1994540639753. The next prime is 1994540639761. The reversal of 1994540639755 is 5579360454991.

It is a cyclic number.

It is not a de Polignac number, because 1994540639755 - 2¹ = 1994540639753 is a prime.

It is a super-3 number, since 3×1994540639755³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1994540639753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 887172 + ... + 2185441.

It is an arithmetic number, because the mean of its divisors is an integer number (157486830570).

Almost surely, 2^{1994540639755} is an apocalyptic number.

1994540639755 is a deficient number, since it is larger than the sum of its proper divisors (525248649365).

1994540639755 is a wasteful number, since it uses less digits than its factorization.

1994540639755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079470.

The product of its (nonzero) digits is 183708000, while the sum is 67.

The spelling of 1994540639755 in words is "one trillion, nine hundred ninety-four billion, five hundred forty million, six hundred thirty-nine thousand, seven hundred fifty-five".