67561478652951 has 12 divisors (see below), whose sum is σ = 97589809612360. Its totient is φ = 45040520946960.

The previous prime is 67561478652949. The next prime is 67561478652979. The reversal of 67561478652951 is 15925687416576.

67561478652951 is a `hidden beast` number, since 6 + 7 + 5 + 6 + 1 + 47 + 8 + 6 + 529 + 51 = 666.

It is not a de Polignac number, because 67561478652951 - 2¹ = 67561478652949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67561478652951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67561478652901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37813441 + ... + 39559818.

Almost surely, 2^{67561478652951} is an apocalyptic number.

67561478652951 is a deficient number, since it is larger than the sum of its proper divisors (30028330959409).

67561478652951 is a wasteful number, since it uses less digits than its factorization.

67561478652951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77470286 (or 77470283 counting only the distinct ones).

The product of its digits is 762048000, while the sum is 72.

The spelling of 67561478652951 in words is "sixty-seven trillion, five hundred sixty-one billion, four hundred seventy-eight million, six hundred fifty-two thousand, nine hundred fifty-one".