1263464040960 has 640 divisors, whose sum is σ = 4944698161920. Its totient is φ = 303243264000.

The previous prime is 1263464040947. The next prime is 1263464040967. The reversal of 1263464040960 is 690404643621.

1263464040960 is a `hidden beast` number, since 1 + 2 + 63 + 464 + 0 + 40 + 96 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

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

It is not an unprimeable number, because it can be changed into a prime (1263464040967) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76784094 + ... + 76800546.

It is an arithmetic number, because the mean of its divisors is an integer number (7726090878).

Almost surely, 2^{1263464040960} is an apocalyptic number.

1263464040960 is a gapful number since it is divisible by the number (10) 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 1263464040960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2472349080960).

1263464040960 is an abundant number, since it is smaller than the sum of its proper divisors (3681234120960).

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

1263464040960 is a wasteful number, since it uses less digits than its factorization.

1263464040960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16597 (or 16575 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 1263464040960 in words is "one trillion, two hundred sixty-three billion, four hundred sixty-four million, forty thousand, nine hundred sixty".