77653466051521 has 16 divisors (see below), whose sum is σ = 80811707429376. Its totient is φ = 74538540000000.

The previous prime is 77653466051507. The next prime is 77653466051549. The reversal of 77653466051521 is 12515066435677.

It is a cyclic number.

It is not a de Polignac number, because 77653466051521 - 2¹⁹ = 77653465527233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77653466051561) 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 15 ways as a sum of consecutive naturals, for example, 18829930 + ... + 22580371.

It is an arithmetic number, because the mean of its divisors is an integer number (5050731714336).

Almost surely, 2^{77653466051521} is an apocalyptic number.

It is an amenable number.

77653466051521 is a deficient number, since it is larger than the sum of its proper divisors (3158241377855).

77653466051521 is a wasteful number, since it uses less digits than its factorization.

77653466051521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41410824.

The product of its (nonzero) digits is 31752000, while the sum is 58.

The spelling of 77653466051521 in words is "seventy-seven trillion, six hundred fifty-three billion, four hundred sixty-six million, fifty-one thousand, five hundred twenty-one".