85401555547 has 32 divisors (see below), whose sum is σ = 112334745600. Its totient is φ = 62900128800.

The previous prime is 85401555517. The next prime is 85401555563. The reversal of 85401555547 is 74555510458.

It is a cyclic number.

It is not a de Polignac number, because 85401555547 - 2³⁵ = 51041817179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85401555547.

It is not an unprimeable number, because it can be changed into a prime (85401555517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 575772 + ... + 708742.

It is an arithmetic number, because the mean of its divisors is an integer number (3510460800).

Almost surely, 2^85401555547 is an apocalyptic number.

85401555547 is a deficient number, since it is larger than the sum of its proper divisors (26933190053).

85401555547 is a wasteful number, since it uses less digits than its factorization.

85401555547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133447.

The product of its (nonzero) digits is 2800000, while the sum is 49.

The spelling of 85401555547 in words is "eighty-five billion, four hundred one million, five hundred fifty-five thousand, five hundred forty-seven".