1650715641 has 27 divisors (see below), whose sum is σ = 2474720911. Its totient is φ = 1060254384.

The previous prime is 1650715631. The next prime is 1650715697. The reversal of 1650715641 is 1465170561.

It is a happy number.

The square root of 1650715641 is 40629.

It is a perfect power (a square), and thus also a powerful number.

1650715641 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 7 + 1 + 5 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 865595241 + 785120400 = 29421^2 + 28020^2 .

It is not a de Polignac number, because 1650715641 - 2⁷ = 1650715513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1650715596 and 1650715605.

It is not an unprimeable number, because it can be changed into a prime (1650715631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3534490 + ... + 3534956.

Almost surely, 2^1650715641 is an apocalyptic number.

1650715641 is the 40629-th square number.

1650715641 is the 20315-th centered octagonal number.

It is an amenable number.

1650715641 is a deficient number, since it is larger than the sum of its proper divisors (824005270).

1650715641 is an frugal number, since it uses more digits than its factorization.

1650715641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The cubic root of 1650715641 is about 1181.8365638473.

Multiplying 1650715641 by its sum of digits (36), we get a square (59425763076 = 243774²).

The spelling of 1650715641 in words is "one billion, six hundred fifty million, seven hundred fifteen thousand, six hundred forty-one".