78524141745531 has 16 divisors (see below), whose sum is σ = 108128123264000. Its totient is φ = 50636415440160.

The previous prime is 78524141745509. The next prime is 78524141745601. The reversal of 78524141745531 is 13554714142587.

It is a happy number.

It is not a de Polignac number, because 78524141745531 - 2¹⁰ = 78524141744507 is a prime.

It is a super-2 number, since 2×78524141745531² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78524141045531) 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, 202481656 + ... + 202869093.

It is an arithmetic number, because the mean of its divisors is an integer number (6758007704000).

Almost surely, 2^{78524141745531} is an apocalyptic number.

78524141745531 is a deficient number, since it is larger than the sum of its proper divisors (29603981518469).

78524141745531 is a wasteful number, since it uses less digits than its factorization.

78524141745531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405352866.

The product of its digits is 18816000, while the sum is 57.

The spelling of 78524141745531 in words is "seventy-eight trillion, five hundred twenty-four billion, one hundred forty-one million, seven hundred forty-five thousand, five hundred thirty-one".