78298390654 has 32 divisors (see below), whose sum is σ = 128777755392. Its totient is φ = 35409192000.

The previous prime is 78298390649. The next prime is 78298390663. The reversal of 78298390654 is 45609389287.

It is a super-2 number, since 2×78298390654² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78298390592 and 78298390601.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3732114 + ... + 3753034.

It is an arithmetic number, because the mean of its divisors is an integer number (4024304856).

Almost surely, 2^78298390654 is an apocalyptic number.

78298390654 is a deficient number, since it is larger than the sum of its proper divisors (50479364738).

78298390654 is a wasteful number, since it uses less digits than its factorization.

78298390654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21792.

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 78298390654 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred ninety thousand, six hundred fifty-four".