78533711621807 has 32 divisors (see below), whose sum is σ = 89441472120000. Its totient is φ = 68357094082560.

The previous prime is 78533711621803. The next prime is 78533711621821. The reversal of 78533711621807 is 70812611733587.

It is a cyclic number.

It is not a de Polignac number, because 78533711621807 - 2² = 78533711621803 is a prime.

It is a super-3 number, since 3×78533711621807³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78533711621803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115679669 + ... + 116356577.

It is an arithmetic number, because the mean of its divisors is an integer number (2795046003750).

Almost surely, 2^{78533711621807} is an apocalyptic number.

78533711621807 is a deficient number, since it is larger than the sum of its proper divisors (10907760498193).

78533711621807 is a wasteful number, since it uses less digits than its factorization.

78533711621807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679131.

The product of its (nonzero) digits is 11854080, while the sum is 59.

The spelling of 78533711621807 in words is "seventy-eight trillion, five hundred thirty-three billion, seven hundred eleven million, six hundred twenty-one thousand, eight hundred seven".