78020355541 has 12 divisors (see below), whose sum is σ = 79993569376. Its totient is φ = 76094707680.

The previous prime is 78020355529. The next prime is 78020355547. The reversal of 78020355541 is 14555302087.

It is not a de Polignac number, because 78020355541 - 2³⁵ = 43660617173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78020355494 and 78020355503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78020355547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9549040 + ... + 9557206.

Almost surely, 2^78020355541 is an apocalyptic number.

It is an amenable number.

78020355541 is a deficient number, since it is larger than the sum of its proper divisors (1973213835).

78020355541 is an equidigital number, since it uses as much as digits as its factorization.

78020355541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13932 (or 13891 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 78020355541 in words is "seventy-eight billion, twenty million, three hundred fifty-five thousand, five hundred forty-one".