1681769474 has 128 divisors (see below), whose sum is σ = 3375820800. Its totient is φ = 622339200.

The previous prime is 1681769471. The next prime is 1681769513. The reversal of 1681769474 is 4749671861.

It is not an unprimeable number, because it can be changed into a prime (1681769471) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23037902 + ... + 23037974.

It is an arithmetic number, because the mean of its divisors is an integer number (26373600).

Almost surely, 2^1681769474 is an apocalyptic number.

1681769474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1681769474 is an abundant number, since it is smaller than the sum of its proper divisors (1694051326).

1681769474 is a wasteful number, since it uses less digits than its factorization.

1681769474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 207 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 53.

The square root of 1681769474 is about 41009.3827556573. The cubic root of 1681769474 is about 1189.2016097956.

The spelling of 1681769474 in words is "one billion, six hundred eighty-one million, seven hundred sixty-nine thousand, four hundred seventy-four".