1631746552553 has 4 divisors (see below), whose sum is σ = 1757265518148. Its totient is φ = 1506227586960.

The previous prime is 1631746552547. The next prime is 1631746552571. The reversal of 1631746552553 is 3552556471361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 639547280089 + 992199272464 = 799717^2 + 996092^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631746552553 - 2⁶ = 1631746552489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1631746552495 and 1631746552504.

It is not an unprimeable number, because it can be changed into a prime (1631746552543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62759482778 + ... + 62759482803.

It is an arithmetic number, because the mean of its divisors is an integer number (439316379537).

Almost surely, 2^{1631746552553} is an apocalyptic number.

1631746552553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1631746552553 is a deficient number, since it is larger than the sum of its proper divisors (125518965595).

1631746552553 is a wasteful number, since it uses less digits than its factorization.

1631746552553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125518965594.

The product of its digits is 11340000, while the sum is 53.

The spelling of 1631746552553 in words is "one trillion, six hundred thirty-one billion, seven hundred forty-six million, five hundred fifty-two thousand, five hundred fifty-three".