1958641630 has 16 divisors (see below), whose sum is σ = 3846060144. Its totient is φ = 712233280.

The previous prime is 1958641589. The next prime is 1958641637. The reversal of 1958641630 is 361468591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1958641637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8902807 + ... + 8903026.

It is an arithmetic number, because the mean of its divisors is an integer number (240378759).

Almost surely, 2^1958641630 is an apocalyptic number.

1958641630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1958641630 is a deficient number, since it is larger than the sum of its proper divisors (1887418514).

1958641630 is a wasteful number, since it uses less digits than its factorization.

1958641630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17805851.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1958641630 is about 44256.5433580166. The cubic root of 1958641630 is about 1251.1757747629.

It can be divided in two parts, 19586 and 41630, that added together give a palindrome (61216).

The spelling of 1958641630 in words is "one billion, nine hundred fifty-eight million, six hundred forty-one thousand, six hundred thirty".