1641977950 has 24 divisors (see below), whose sum is σ = 3097100880. Its totient is φ = 647539200.

The previous prime is 1641977927. The next prime is 1641977957. The reversal of 1641977950 is 597791461.

It is a junction number, because it is equal to n+sod(n) for n = 1641977894 and 1641977903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641977957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227715 + ... + 234814.

It is an arithmetic number, because the mean of its divisors is an integer number (129045870).

Almost surely, 2^1641977950 is an apocalyptic number.

1641977950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1641977950 is a deficient number, since it is larger than the sum of its proper divisors (1455122930).

1641977950 is a wasteful number, since it uses less digits than its factorization.

1641977950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462612 (or 462607 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 1641977950 is about 40521.3271006763. The cubic root of 1641977950 is about 1179.7476119216.

The spelling of 1641977950 in words is "one billion, six hundred forty-one million, nine hundred seventy-seven thousand, nine hundred fifty".