1641029990 has 64 divisors (see below), whose sum is σ = 3173354496. Its totient is φ = 609578112.

The previous prime is 1641029983. The next prime is 1641030011. The reversal of 1641029990 is 999201461.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1254917 + ... + 1256223.

It is an arithmetic number, because the mean of its divisors is an integer number (49583664).

Almost surely, 2^1641029990 is an apocalyptic number.

1641029990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1641029990 is a deficient number, since it is larger than the sum of its proper divisors (1532324506).

1641029990 is a wasteful number, since it uses less digits than its factorization.

1641029990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 1641029990 is about 40509.6283616624. The cubic root of 1641029990 is about 1179.5205344033.

The spelling of 1641029990 in words is "one billion, six hundred forty-one million, twenty-nine thousand, nine hundred ninety".