78618421030 has 16 divisors (see below), whose sum is σ = 145337838480. Its totient is φ = 30597439392.

The previous prime is 78618421003. The next prime is 78618421043. The reversal of 78618421030 is 3012481687.

It is a super-2 number, since 2×78618421030² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 106240740 + ... + 106241479.

It is an arithmetic number, because the mean of its divisors is an integer number (9083614905).

Almost surely, 2^78618421030 is an apocalyptic number.

78618421030 is a deficient number, since it is larger than the sum of its proper divisors (66719417450).

78618421030 is a wasteful number, since it uses less digits than its factorization.

78618421030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212482263.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 78618421030 in words is "seventy-eight billion, six hundred eighteen million, four hundred twenty-one thousand, thirty".