78554053541 has 4 divisors (see below), whose sum is σ = 78569969772. Its totient is φ = 78538137312.

The previous prime is 78554053493. The next prime is 78554053579. The reversal of 78554053541 is 14535045587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14535045587 = 41 ⋅354513307.

It can be written as a sum of positive squares in 2 ways, for example, as 34560669025 + 43993384516 = 185905^2 + 209746^2 .

It is a cyclic number.

It is not a de Polignac number, because 78554053541 - 2³⁴ = 61374184357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78554053141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7950710 + ... + 7960583.

It is an arithmetic number, because the mean of its divisors is an integer number (19642492443).

Almost surely, 2^78554053541 is an apocalyptic number.

It is an amenable number.

78554053541 is a deficient number, since it is larger than the sum of its proper divisors (15916231).

78554053541 is a wasteful number, since it uses less digits than its factorization.

78554053541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15916230.

The product of its (nonzero) digits is 1680000, while the sum is 47.

The spelling of 78554053541 in words is "seventy-eight billion, five hundred fifty-four million, fifty-three thousand, five hundred forty-one".