1631661367 has 8 divisors (see below), whose sum is σ = 1895326112. Its totient is φ = 1375639200.

The previous prime is 1631661349. The next prime is 1631661391. The reversal of 1631661367 is 7631661361.

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

It is a cyclic number.

It is not a de Polignac number, because 1631661367 - 2¹⁵ = 1631628599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631661397) 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, 1910184 + ... + 1911037.

It is an arithmetic number, because the mean of its divisors is an integer number (236915764).

Almost surely, 2^1631661367 is an apocalyptic number.

1631661367 is a deficient number, since it is larger than the sum of its proper divisors (263664745).

1631661367 is an equidigital number, since it uses as much as digits as its factorization.

1631661367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821289.

The product of its digits is 81648, while the sum is 40.

The square root of 1631661367 is about 40393.8283280998. The cubic root of 1631661367 is about 1177.2716258402.

The spelling of 1631661367 in words is "one billion, six hundred thirty-one million, six hundred sixty-one thousand, three hundred sixty-seven".