78298390747 has 8 divisors (see below), whose sum is σ = 82961261856. Its totient is φ = 73641862272.

The previous prime is 78298390741. The next prime is 78298390777. The reversal of 78298390747 is 74709389287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78298390747 - 2¹⁹ = 78297866459 is a prime.

It is a super-2 number, since 2×78298390747² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78298390741) 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 7 ways as a sum of consecutive naturals, for example, 1560223 + ... + 1609624.

It is an arithmetic number, because the mean of its divisors is an integer number (10370157732).

Almost surely, 2^78298390747 is an apocalyptic number.

78298390747 is a deficient number, since it is larger than the sum of its proper divisors (4662871109).

78298390747 is a wasteful number, since it uses less digits than its factorization.

78298390747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171317.

The product of its (nonzero) digits is 42674688, while the sum is 64.

The spelling of 78298390747 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred ninety thousand, seven hundred forty-seven".