78298390629 has 6 divisors (see below), whose sum is σ = 113097675366. Its totient is φ = 52198927080.

The previous prime is 78298390571. The next prime is 78298390649. The reversal of 78298390629 is 92609389287.

It can be written as a sum of positive squares in only one way, i.e., 78025248900 + 273141729 = 279330^2 + 16527^2 .

It is not a de Polignac number, because 78298390629 - 2¹⁵ = 78298357861 is a prime.

It is a super-2 number, since 2×78298390629² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78298390649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4349910582 + ... + 4349910599.

It is an arithmetic number, because the mean of its divisors is an integer number (18849612561).

Almost surely, 2^78298390629 is an apocalyptic number.

It is an amenable number.

78298390629 is a deficient number, since it is larger than the sum of its proper divisors (34799284737).

78298390629 is a wasteful number, since it uses less digits than its factorization.

78298390629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8699821187 (or 8699821184 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 78298390629 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred ninety thousand, six hundred twenty-nine".