85420366761 has 4 divisors (see below), whose sum is σ = 113893822352. Its totient is φ = 56946911172.

The previous prime is 85420366721. The next prime is 85420366777. The reversal of 85420366761 is 16766302458.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 85420366761 - 2¹⁷ = 85420235689 is a prime.

It is a super-2 number, since 2×85420366761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85420366761.

It is not an unprimeable number, because it can be changed into a prime (85420366711) 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, 14236727791 + ... + 14236727796.

It is an arithmetic number, because the mean of its divisors is an integer number (28473455588).

Almost surely, 2^85420366761 is an apocalyptic number.

It is an amenable number.

85420366761 is a deficient number, since it is larger than the sum of its proper divisors (28473455591).

85420366761 is a wasteful number, since it uses less digits than its factorization.

85420366761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28473455590.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 85420366761 in words is "eighty-five billion, four hundred twenty million, three hundred sixty-six thousand, seven hundred sixty-one".