1275452153640 has 192 divisors, whose sum is σ = 4804118242560. Its totient is φ = 287425797120.

The previous prime is 1275452153627. The next prime is 1275452153669. The reversal of 1275452153640 is 463512545721.

1275452153640 is a `hidden beast` number, since 1 + 2 + 7 + 5 + 452 + 153 + 6 + 40 = 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 47 ways as a sum of consecutive naturals, for example, 3385389 + ... + 3743228.

It is an arithmetic number, because the mean of its divisors is an integer number (25021449180).

Almost surely, 2^{1275452153640} is an apocalyptic number.

1275452153640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275452153640 is an abundant number, since it is smaller than the sum of its proper divisors (3528666088920).

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

1275452153640 is a wasteful number, since it uses less digits than its factorization.

1275452153640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7128712 (or 7128705 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 45.

The spelling of 1275452153640 in words is "one trillion, two hundred seventy-five billion, four hundred fifty-two million, one hundred fifty-three thousand, six hundred forty".