78881655187445 has 16 divisors (see below), whose sum is σ = 103265214992640. Its totient is φ = 57367389115200.

The previous prime is 78881655187411. The next prime is 78881655187451. The reversal of 78881655187445 is 54478155618887.

It is not a de Polignac number, because 78881655187445 - 2¹⁴ = 78881655171061 is a prime.

It is a super-2 number, since 2×78881655187445² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10658525 + ... + 16473234.

It is an arithmetic number, because the mean of its divisors is an integer number (6454075937040).

Almost surely, 2^{78881655187445} is an apocalyptic number.

It is an amenable number.

78881655187445 is a deficient number, since it is larger than the sum of its proper divisors (24383559805195).

78881655187445 is a wasteful number, since it uses less digits than its factorization.

78881655187445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27184636.

The product of its digits is 2408448000, while the sum is 77.

The spelling of 78881655187445 in words is "seventy-eight trillion, eight hundred eighty-one billion, six hundred fifty-five million, one hundred eighty-seven thousand, four hundred forty-five".