1994257761 has 32 divisors (see below), whose sum is σ = 2824243200. Its totient is φ = 1249765440.

The previous prime is 1994257723. The next prime is 1994257763. The reversal of 1994257761 is 1677524991.

It is not a de Polignac number, because 1994257761 - 2⁷ = 1994257633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1994257763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547416 + ... + 551046.

It is an arithmetic number, because the mean of its divisors is an integer number (88257600).

Almost surely, 2^1994257761 is an apocalyptic number.

It is an amenable number.

1994257761 is a deficient number, since it is larger than the sum of its proper divisors (829985439).

1994257761 is a wasteful number, since it uses less digits than its factorization.

1994257761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829.

The product of its digits is 952560, while the sum is 51.

The square root of 1994257761 is about 44657.1132183888. The cubic root of 1994257761 is about 1258.7140994255.

The spelling of 1994257761 in words is "one billion, nine hundred ninety-four million, two hundred fifty-seven thousand, seven hundred sixty-one".