78622843551 has 32 divisors (see below), whose sum is σ = 120636564480. Its totient is φ = 44616289536.

The previous prime is 78622843517. The next prime is 78622843633. The reversal of 78622843551 is 15534822687.

It is not a de Polignac number, because 78622843551 - 2⁷ = 78622843423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78622843494 and 78622843503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78622843501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7040110 + ... + 7051268.

It is an arithmetic number, because the mean of its divisors is an integer number (3769892640).

Almost surely, 2^78622843551 is an apocalyptic number.

78622843551 is a deficient number, since it is larger than the sum of its proper divisors (42013720929).

78622843551 is a wasteful number, since it uses less digits than its factorization.

78622843551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13463.

The product of its digits is 3225600, while the sum is 51.

The spelling of 78622843551 in words is "seventy-eight billion, six hundred twenty-two million, eight hundred forty-three thousand, five hundred fifty-one".