78893620431 has 16 divisors (see below), whose sum is σ = 105780864000. Its totient is φ = 52301886048.

The previous prime is 78893620423. The next prime is 78893620493. The reversal of 78893620431 is 13402639887.

It is not a de Polignac number, because 78893620431 - 2³ = 78893620423 is a prime.

It is a super-2 number, since 2×78893620431² (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 (78893620331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281590 + ... + 486908.

It is an arithmetic number, because the mean of its divisors is an integer number (6611304000).

Almost surely, 2^78893620431 is an apocalyptic number.

78893620431 is a deficient number, since it is larger than the sum of its proper divisors (26887243569).

78893620431 is a wasteful number, since it uses less digits than its factorization.

78893620431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206038.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 78893620431 in words is "seventy-eight billion, eight hundred ninety-three million, six hundred twenty thousand, four hundred thirty-one".