85409477983 has 2 divisors, whose sum is σ = 85409477984. Its totient is φ = 85409477982.

The previous prime is 85409477941. The next prime is 85409478023. The reversal of 85409477983 is 38977490458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85409477983 - 2²⁵ = 85375923551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85409477683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42704738991 + 42704738992.

It is an arithmetic number, because the mean of its divisors is an integer number (42704738992).

Almost surely, 2^85409477983 is an apocalyptic number.

85409477983 is a deficient number, since it is larger than the sum of its proper divisors (1).

85409477983 is an equidigital number, since it uses as much as digits as its factorization.

85409477983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 85409477983 in words is "eighty-five billion, four hundred nine million, four hundred seventy-seven thousand, nine hundred eighty-three".