78621026433 has 32 divisors (see below), whose sum is σ = 112654556160. Its totient is φ = 48661966080.

The previous prime is 78621026413. The next prime is 78621026441. The reversal of 78621026433 is 33462012687.

It is not a de Polignac number, because 78621026433 - 2²⁰ = 78619977857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78621026413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330591 + ... + 516267.

It is an arithmetic number, because the mean of its divisors is an integer number (3520454880).

Almost surely, 2^78621026433 is an apocalyptic number.

It is an amenable number.

78621026433 is a deficient number, since it is larger than the sum of its proper divisors (34033529727).

78621026433 is a wasteful number, since it uses less digits than its factorization.

78621026433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185897.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 78621026433 in words is "seventy-eight billion, six hundred twenty-one million, twenty-six thousand, four hundred thirty-three".