78298390653 has 32 divisors (see below), whose sum is σ = 121364613120. Its totient is φ = 43972528320.

The previous prime is 78298390649. The next prime is 78298390663. The reversal of 78298390653 is 35609389287.

It is not a de Polignac number, because 78298390653 - 2² = 78298390649 is a prime.

It is a super-2 number, since 2×78298390653² (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 (78298390663) 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 31 ways as a sum of consecutive naturals, for example, 9520083 + ... + 9528303.

It is an arithmetic number, because the mean of its divisors is an integer number (3792644160).

Almost surely, 2^78298390653 is an apocalyptic number.

It is an amenable number.

78298390653 is a deficient number, since it is larger than the sum of its proper divisors (43066222467).

78298390653 is a wasteful number, since it uses less digits than its factorization.

78298390653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15977.

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 78298390653 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred ninety thousand, six hundred fifty-three".