1631717648 has 20 divisors (see below), whose sum is σ = 3448858128. Its totient is φ = 741689760.

The previous prime is 1631717611. The next prime is 1631717651. The reversal of 1631717648 is 8467171361.

It is a happy number.

It is a super-3 number, since 3×1631717648³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1631717599 and 1631717608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4635386 + ... + 4635737.

Almost surely, 2^1631717648 is an apocalyptic number.

It is an amenable number.

1631717648 is an abundant number, since it is smaller than the sum of its proper divisors (1817140480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1631717648 is a wasteful number, since it uses less digits than its factorization.

1631717648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9271142 (or 9271136 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 1631717648 is about 40394.5249755459. The cubic root of 1631717648 is about 1177.2851615864.

The spelling of 1631717648 in words is "one billion, six hundred thirty-one million, seven hundred seventeen thousand, six hundred forty-eight".