1641263490 has 48 divisors (see below), whose sum is σ = 4330991808. Its totient is φ = 431136288.

The previous prime is 1641263461. The next prime is 1641263527. The reversal of 1641263490 is 943621461.

1641263490 is a `hidden beast` number, since 1 + 6 + 4 + 12 + 634 + 9 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130062 + ... + 142121.

It is an arithmetic number, because the mean of its divisors is an integer number (90228996).

Almost surely, 2^1641263490 is an apocalyptic number.

1641263490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1641263490 is an abundant number, since it is smaller than the sum of its proper divisors (2689728318).

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

1641263490 is a wasteful number, since it uses less digits than its factorization.

1641263490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272263 (or 272260 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1641263490 is about 40512.5102900326. The cubic root of 1641263490 is about 1179.5764758922.

The spelling of 1641263490 in words is "one billion, six hundred forty-one million, two hundred sixty-three thousand, four hundred ninety".