1635425057644 has 48 divisors (see below), whose sum is σ = 3289528972800. Its totient is φ = 696894811776.

The previous prime is 1635425057597. The next prime is 1635425057723. The reversal of 1635425057644 is 4467505245361.

It is a junction number, because it is equal to n+sod(n) for n = 1635425057591 and 1635425057600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56315352 + ... + 56344384.

It is an arithmetic number, because the mean of its divisors is an integer number (68531853600).

Almost surely, 2^{1635425057644} is an apocalyptic number.

1635425057644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1635425057644 is an abundant number, since it is smaller than the sum of its proper divisors (1654103915156).

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

1635425057644 is a wasteful number, since it uses less digits than its factorization.

1635425057644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40462 (or 40460 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 52.

The spelling of 1635425057644 in words is "one trillion, six hundred thirty-five billion, four hundred twenty-five million, fifty-seven thousand, six hundred forty-four".