1994777974403 has 4 divisors (see below), whose sum is σ = 1994917259688. Its totient is φ = 1994638689120.

The previous prime is 1994777974351. The next prime is 1994777974457. The reversal of 1994777974403 is 3044797774991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1994777974403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1994777973403) 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, 69621158 + ... + 69649803.

It is an arithmetic number, because the mean of its divisors is an integer number (498729314922).

Almost surely, 2^{1994777974403} is an apocalyptic number.

1994777974403 is a deficient number, since it is larger than the sum of its proper divisors (139285285).

1994777974403 is a wasteful number, since it uses less digits than its factorization.

1994777974403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139285284.

The product of its (nonzero) digits is 336063168, while the sum is 71.

The spelling of 1994777974403 in words is "one trillion, nine hundred ninety-four billion, seven hundred seventy-seven million, nine hundred seventy-four thousand, four hundred three".