65900019090 has 32 divisors (see below), whose sum is σ = 158166872640. Its totient is φ = 17572579904.

The previous prime is 65900019067. The next prime is 65900019091. The reversal of 65900019090 is 9091000956.

It is not an unprimeable number, because it can be changed into a prime (65900019091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1181041 + ... + 1235579.

It is an arithmetic number, because the mean of its divisors is an integer number (4942714770).

Almost surely, 2^65900019090 is an apocalyptic number.

65900019090 is an abundant number, since it is smaller than the sum of its proper divisors (92266853550).

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

65900019090 is a wasteful number, since it uses less digits than its factorization.

65900019090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94826.

The product of its (nonzero) digits is 21870, while the sum is 39.

The spelling of 65900019090 in words is "sixty-five billion, nine hundred million, nineteen thousand, ninety".