67304781972 has 18 divisors (see below), whose sum is σ = 170131532298. Its totient is φ = 22434927312.

The previous prime is 67304781967. The next prime is 67304781977. The reversal of 67304781972 is 27918740376.

67304781972 is a `hidden beast` number, since 67 + 30 + 478 + 19 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (67304781967) and next prime (67304781977).

It can be written as a sum of positive squares in only one way, i.e., 46627492356 + 20677289616 = 215934^2 + 143796^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67304781977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 934788603 + ... + 934788674.

Almost surely, 2^67304781972 is an apocalyptic number.

It is an amenable number.

67304781972 is an abundant number, since it is smaller than the sum of its proper divisors (102826750326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67304781972 is a wasteful number, since it uses less digits than its factorization.

67304781972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869577287 (or 1869577282 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 67304781972 in words is "sixty-seven billion, three hundred four million, seven hundred eighty-one thousand, nine hundred seventy-two".