260326772640 has 384 divisors, whose sum is σ = 1020846032640. Its totient is φ = 61403443200.

The previous prime is 260326772621. The next prime is 260326772669. The reversal of 260326772640 is 46277623062.

260326772640 is a `hidden beast` number, since 2 + 60 + 326 + 7 + 7 + 264 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1684210 + ... + 1832270.

It is an arithmetic number, because the mean of its divisors is an integer number (2658453210).

Almost surely, 2^260326772640 is an apocalyptic number.

260326772640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260326772640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510423016320).

260326772640 is an abundant number, since it is smaller than the sum of its proper divisors (760519260000).

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

260326772640 is a wasteful number, since it uses less digits than its factorization.

260326772640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148133 (or 148119 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 45.

The spelling of 260326772640 in words is "two hundred sixty billion, three hundred twenty-six million, seven hundred seventy-two thousand, six hundred forty".