85437402461 has 2 divisors, whose sum is σ = 85437402462. Its totient is φ = 85437402460.

The previous prime is 85437402443. The next prime is 85437402473. The reversal of 85437402461 is 16420473458.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65705581561 + 19731820900 = 256331^2 + 140470^2 .

It is a cyclic number.

It is not a de Polignac number, because 85437402461 - 2¹⁰ = 85437401437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85437402761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42718701230 + 42718701231.

It is an arithmetic number, because the mean of its divisors is an integer number (42718701231).

Almost surely, 2^85437402461 is an apocalyptic number.

It is an amenable number.

85437402461 is a deficient number, since it is larger than the sum of its proper divisors (1).

85437402461 is an equidigital number, since it uses as much as digits as its factorization.

85437402461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 44.

The spelling of 85437402461 in words is "eighty-five billion, four hundred thirty-seven million, four hundred two thousand, four hundred sixty-one".