1634561731641 has 8 divisors (see below), whose sum is σ = 2179423809664. Its totient is φ = 1089703737360.

The previous prime is 1634561731639. The next prime is 1634561731667. The reversal of 1634561731641 is 1461371654361.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1634561731641 - 2¹ = 1634561731639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1634561731841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83775 + ... + 1810011.

It is an arithmetic number, because the mean of its divisors is an integer number (272427976208).

Almost surely, 2^{1634561731641} is an apocalyptic number.

It is an amenable number.

1634561731641 is a deficient number, since it is larger than the sum of its proper divisors (544862078023).

1634561731641 is a wasteful number, since it uses less digits than its factorization.

1634561731641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041871.

The product of its digits is 1088640, while the sum is 48.

The spelling of 1634561731641 in words is "one trillion, six hundred thirty-four billion, five hundred sixty-one million, seven hundred thirty-one thousand, six hundred forty-one".