681913487469 has 32 divisors (see below), whose sum is σ = 968530710400. Its totient is φ = 426729586176.

The previous prime is 681913487467. The next prime is 681913487473. The reversal of 681913487469 is 964784319186.

It is not a de Polignac number, because 681913487469 - 2¹ = 681913487467 is a prime.

It is a super-2 number, since 2×681913487469² (a number of 24 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 (681913487467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2090877 + ... + 2394909.

It is an arithmetic number, because the mean of its divisors is an integer number (30266584700).

Almost surely, 2^681913487469 is an apocalyptic number.

It is an amenable number.

681913487469 is a deficient number, since it is larger than the sum of its proper divisors (286617222931).

681913487469 is a wasteful number, since it uses less digits than its factorization.

681913487469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304202 (or 304164 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 66.

The spelling of 681913487469 in words is "six hundred eighty-one billion, nine hundred thirteen million, four hundred eighty-seven thousand, four hundred sixty-nine".