1634672645 has 8 divisors (see below), whose sum is σ = 1962097440. Its totient is φ = 1307411280.

The previous prime is 1634672623. The next prime is 1634672651. The reversal of 1634672645 is 5462764361.

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

It is not a de Polignac number, because 1634672645 - 2¹⁸ = 1634410501 is a prime.

It is a super-2 number, since 2×1634672645² = 5344309312622592050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1634672596 and 1634672605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17651 + ... + 59840.

It is an arithmetic number, because the mean of its divisors is an integer number (245262180).

Almost surely, 2^1634672645 is an apocalyptic number.

It is an amenable number.

1634672645 is a deficient number, since it is larger than the sum of its proper divisors (327424795).

1634672645 is an equidigital number, since it uses as much as digits as its factorization.

1634672645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81715.

The product of its digits is 725760, while the sum is 44.

The square root of 1634672645 is about 40431.0851326056. The cubic root of 1634672645 is about 1177.9954103205.

The spelling of 1634672645 in words is "one billion, six hundred thirty-four million, six hundred seventy-two thousand, six hundred forty-five".