681420067534 has 16 divisors (see below), whose sum is σ = 1095396774048. Its totient is φ = 317088538272.

The previous prime is 681420067513. The next prime is 681420067547. The reversal of 681420067534 is 435760024186.

It is a super-2 number, since 2×681420067534² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200180457 + ... + 200183860.

It is an arithmetic number, because the mean of its divisors is an integer number (68462298378).

Almost surely, 2^681420067534 is an apocalyptic number.

681420067534 is a deficient number, since it is larger than the sum of its proper divisors (413976706514).

681420067534 is a wasteful number, since it uses less digits than its factorization.

681420067534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400364379.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 681420067534 in words is "six hundred eighty-one billion, four hundred twenty million, sixty-seven thousand, five hundred thirty-four".