1994769692477 has 6 divisors (see below), whose sum is σ = 2032417332702. Its totient is φ = 1957122440312.

The previous prime is 1994769692471. The next prime is 1994769692479. The reversal of 1994769692477 is 7742969674991.

It can be written as a sum of positive squares in only one way, i.e., 1844221036441 + 150548656036 = 1358021^2 + 388006^2 .

It is not a de Polignac number, because 1994769692477 - 2¹² = 1994769688381 is a prime.

It is a super-2 number, since 2×1994769692477² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994769692471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10185158 + ... + 10379160.

It is an arithmetic number, because the mean of its divisors is an integer number (338736222117).

Almost surely, 2^{1994769692477} is an apocalyptic number.

It is an amenable number.

1994769692477 is a deficient number, since it is larger than the sum of its proper divisors (37647640225).

1994769692477 is an frugal number, since it uses more digits than its factorization.

1994769692477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388059 (or 194056 counting only the distinct ones).

The product of its digits is 2592487296, while the sum is 80.

The spelling of 1994769692477 in words is "one trillion, nine hundred ninety-four billion, seven hundred sixty-nine million, six hundred ninety-two thousand, four hundred seventy-seven".