1635145561142 has 4 divisors (see below), whose sum is σ = 2452718341716. Its totient is φ = 817572780570.

The previous prime is 1635145561109. The next prime is 1635145561177. The reversal of 1635145561142 is 2411655415361.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1635145561142² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1635145561093 and 1635145561102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408786390284 + ... + 408786390287.

It is an arithmetic number, because the mean of its divisors is an integer number (613179585429).

Almost surely, 2^{1635145561142} is an apocalyptic number.

1635145561142 is a deficient number, since it is larger than the sum of its proper divisors (817572780574).

1635145561142 is an equidigital number, since it uses as much as digits as its factorization.

1635145561142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817572780573.

The product of its digits is 432000, while the sum is 44.

The spelling of 1635145561142 in words is "one trillion, six hundred thirty-five billion, one hundred forty-five million, five hundred sixty-one thousand, one hundred forty-two".