329690987672 has 8 divisors (see below), whose sum is σ = 618170601900. Its totient is φ = 164845493832.

The previous prime is 329690987657. The next prime is 329690987701. The reversal of 329690987672 is 276789096923.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×329690987672² (a number of 24 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20605686722 + ... + 20605686737.

Almost surely, 2^329690987672 is an apocalyptic number.

It is an amenable number.

329690987672 is a deficient number, since it is larger than the sum of its proper divisors (288479614228).

329690987672 is a wasteful number, since it uses less digits than its factorization.

329690987672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41211373465 (or 41211373461 counting only the distinct ones).

The product of its (nonzero) digits is 123451776, while the sum is 68.

The spelling of 329690987672 in words is "three hundred twenty-nine billion, six hundred ninety million, nine hundred eighty-seven thousand, six hundred seventy-two".