1264431585240 has 96 divisors (see below), whose sum is σ = 4119164197200. Its totient is φ = 336380808960.

The previous prime is 1264431585217. The next prime is 1264431585247. The reversal of 1264431585240 is 425851344621.

1264431585240 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 43 + 1 + 585 + 24 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264431585247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4019830 + ... + 4322949.

Almost surely, 2^{1264431585240} is an apocalyptic number.

1264431585240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264431585240 is an abundant number, since it is smaller than the sum of its proper divisors (2854732611960).

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

1264431585240 is a wasteful number, since it uses less digits than its factorization.

1264431585240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8343217 (or 8343210 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 1264431585240 in words is "one trillion, two hundred sixty-four billion, four hundred thirty-one million, five hundred eighty-five thousand, two hundred forty".