1640145253632 has 36 divisors (see below), whose sum is σ = 4365178255200. Its totient is φ = 546715084288.

The previous prime is 1640145253603. The next prime is 1640145253699. The reversal of 1640145253632 is 2363525410461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067802132 + ... + 1067803667.

Almost surely, 2^{1640145253632} is an apocalyptic number.

1640145253632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1640145253632 is an abundant number, since it is smaller than the sum of its proper divisors (2725033001568).

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

1640145253632 is an equidigital number, since it uses as much as digits as its factorization.

1640145253632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135605818 (or 2135605804 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 1640145253632 in words is "one trillion, six hundred forty billion, one hundred forty-five million, two hundred fifty-three thousand, six hundred thirty-two".