1640654025375 has 32 divisors (see below), whose sum is σ = 2735476144128. Its totient is φ = 873275786400.

The previous prime is 1640654025337. The next prime is 1640654025383. The reversal of 1640654025375 is 5735204560461.

It is not a de Polignac number, because 1640654025375 - 2¹³ = 1640654017183 is a prime.

It is a super-2 number, since 2×1640654025375² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4160359 + ... + 4537608.

It is an arithmetic number, because the mean of its divisors is an integer number (85483629504).

Almost surely, 2^{1640654025375} is an apocalyptic number.

1640654025375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1640654025375 is a deficient number, since it is larger than the sum of its proper divisors (1094822118753).

1640654025375 is an equidigital number, since it uses as much as digits as its factorization.

1640654025375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8698488 (or 8698478 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 1640654025375 in words is "one trillion, six hundred forty billion, six hundred fifty-four million, twenty-five thousand, three hundred seventy-five".