85278761990 has 8 divisors (see below), whose sum is σ = 153501771600. Its totient is φ = 34111504792.

The previous prime is 85278761959. The next prime is 85278762011. The reversal of 85278761990 is 9916787258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4263938090 + ... + 4263938109.

It is an arithmetic number, because the mean of its divisors is an integer number (19187721450).

Almost surely, 2^85278761990 is an apocalyptic number.

85278761990 is a deficient number, since it is larger than the sum of its proper divisors (68223009610).

85278761990 is a wasteful number, since it uses less digits than its factorization.

85278761990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8527876206.

The product of its (nonzero) digits is 15240960, while the sum is 62.

The spelling of 85278761990 in words is "eighty-five billion, two hundred seventy-eight million, seven hundred sixty-one thousand, nine hundred ninety".