90726136240 has 20 divisors (see below), whose sum is σ = 210938266944. Its totient is φ = 36290454464.

The previous prime is 90726136213. The next prime is 90726136301. The reversal of 90726136240 is 4263162709.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 90726136193 and 90726136202.

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, 567038272 + ... + 567038431.

Almost surely, 2^90726136240 is an apocalyptic number.

It is an amenable number.

90726136240 is an abundant number, since it is smaller than the sum of its proper divisors (120212130704).

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

90726136240 is a wasteful number, since it uses less digits than its factorization.

90726136240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134076716 (or 1134076710 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

Adding to 90726136240 its reverse (4263162709), we get a palindrome (94989298949).

The spelling of 90726136240 in words is "ninety billion, seven hundred twenty-six million, one hundred thirty-six thousand, two hundred forty".