1265344061632 has 56 divisors (see below), whose sum is σ = 2890264455680. Its totient is φ = 538388916480.

The previous prime is 1265344061567. The next prime is 1265344061633. The reversal of 1265344061632 is 2361604435621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×1265344061632² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1265344061633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10097544 + ... + 10222087.

It is an arithmetic number, because the mean of its divisors is an integer number (51611865280).

Almost surely, 2^{1265344061632} is an apocalyptic number.

It is an amenable number.

1265344061632 is an abundant number, since it is smaller than the sum of its proper divisors (1624920394048).

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

1265344061632 is a wasteful number, since it uses less digits than its factorization.

1265344061632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20319789 (or 20319779 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 1265344061632 in words is "one trillion, two hundred sixty-five billion, three hundred forty-four million, sixty-one thousand, six hundred thirty-two".