656201135040 has 112 divisors (see below), whose sum is σ = 2272842149760. Its totient is φ = 159079060480.

The previous prime is 656201135021. The next prime is 656201135047. The reversal of 656201135040 is 40531102656.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 656201134992 and 656201135010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656201135047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31059570 + ... + 31080689.

It is an arithmetic number, because the mean of its divisors is an integer number (20293233480).

Almost surely, 2^656201135040 is an apocalyptic number.

656201135040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656201135040 is an abundant number, since it is smaller than the sum of its proper divisors (1616641014720).

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

656201135040 is a wasteful number, since it uses less digits than its factorization.

656201135040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62140290 (or 62140280 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 656201135040 its reverse (40531102656), we get a palindrome (696732237696).

The spelling of 656201135040 in words is "six hundred fifty-six billion, two hundred one million, one hundred thirty-five thousand, forty".