1295390870640 has 120 divisors (see below), whose sum is σ = 4411627111008. Its totient is φ = 340572234240.

The previous prime is 1295390870629. The next prime is 1295390870651. The reversal of 1295390870640 is 460780935921.

1295390870640 is a `hidden beast` number, since 1 + 29 + 539 + 0 + 87 + 0 + 6 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1295390870629) and next prime (1295390870651).

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12618979 + ... + 12721218.

It is a 1-persistent number, because it is pandigital, but 2⋅1295390870640 = 2590781741280 is not.

Almost surely, 2^{1295390870640} is an apocalyptic number.

1295390870640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1295390870640 is an abundant number, since it is smaller than the sum of its proper divisors (3116236240368).

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

1295390870640 is a wasteful number, since it uses less digits than its factorization.

1295390870640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25340287 (or 25340278 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 1295390870640 in words is "one trillion, two hundred ninety-five billion, three hundred ninety million, eight hundred seventy thousand, six hundred forty".