72678565429 has 2 divisors, whose sum is σ = 72678565430. Its totient is φ = 72678565428.

The previous prime is 72678565409. The next prime is 72678565469. The reversal of 72678565429 is 92456587627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72456257329 + 222308100 = 269177^2 + 14910^2 .

It is a cyclic number.

It is not a de Polignac number, because 72678565429 - 2²⁹ = 72141694517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72678565409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36339282714 + 36339282715.

It is an arithmetic number, because the mean of its divisors is an integer number (36339282715).

Almost surely, 2^72678565429 is an apocalyptic number.

It is an amenable number.

72678565429 is a deficient number, since it is larger than the sum of its proper divisors (1).

72678565429 is an equidigital number, since it uses as much as digits as its factorization.

72678565429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50803200, while the sum is 61.

The spelling of 72678565429 in words is "seventy-two billion, six hundred seventy-eight million, five hundred sixty-five thousand, four hundred twenty-nine".