1994956008541 has 4 divisors (see below), whose sum is σ = 1994980171392. Its totient is φ = 1994931845692.

The previous prime is 1994956008523. The next prime is 1994956008637. The reversal of 1994956008541 is 1458006594991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1994956008541 - 2²⁷ = 1994821790813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1994956008541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994956008341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11957155 + ... + 12122848.

It is an arithmetic number, because the mean of its divisors is an integer number (498745042848).

Almost surely, 2^{1994956008541} is an apocalyptic number.

It is an amenable number.

1994956008541 is a deficient number, since it is larger than the sum of its proper divisors (24162851).

1994956008541 is an equidigital number, since it uses as much as digits as its factorization.

1994956008541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24162850.

The product of its (nonzero) digits is 13996800, while the sum is 61.

The spelling of 1994956008541 in words is "one trillion, nine hundred ninety-four billion, nine hundred fifty-six million, eight thousand, five hundred forty-one".