1994574342436 has 27 divisors (see below), whose sum is σ = 3779728951761. Its totient is φ = 920555825904.

The previous prime is 1994574342403. The next prime is 1994574342463. The reversal of 1994574342436 is 6342434754991.

The square root of 1994574342436 is 1412294.

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., 295055376100 + 1699518966336 = 543190^2 + 1303656^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36692485 + ... + 36746803.

Almost surely, 2^{1994574342436} is an apocalyptic number.

1994574342436 is the 1412294-th square number.

It is an amenable number.

1994574342436 is a deficient number, since it is larger than the sum of its proper divisors (1785154609325).

1994574342436 is an frugal number, since it uses more digits than its factorization.

1994574342436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108668 (or 54334 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 61.

The spelling of 1994574342436 in words is "one trillion, nine hundred ninety-four billion, five hundred seventy-four million, three hundred forty-two thousand, four hundred thirty-six".