85151640240 has 60 divisors (see below), whose sum is σ = 285967594224. Its totient is φ = 22707103872.

The previous prime is 85151640239. The next prime is 85151640293. The reversal of 85151640240 is 4204615158.

It is a happy number.

85151640240 is a `hidden beast` number, since 8 + 5 + 1 + 5 + 1 + 640 + 2 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 85151640195 and 85151640204.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59132364 + ... + 59133803.

Almost surely, 2^85151640240 is an apocalyptic number.

85151640240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85151640240 is an abundant number, since it is smaller than the sum of its proper divisors (200815953984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85151640240 is a wasteful number, since it uses less digits than its factorization.

85151640240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118266186 (or 118266177 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 85151640240 in words is "eighty-five billion, one hundred fifty-one million, six hundred forty thousand, two hundred forty".