1958626361 has 4 divisors (see below), whose sum is σ = 1958716452. Its totient is φ = 1958536272.

The previous prime is 1958626309. The next prime is 1958626367. The reversal of 1958626361 is 1636268591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1012448761 + 946177600 = 31819^2 + 30760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1958626361 - 2⁶ = 1958626297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1958626367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9935 + ... + 63371.

It is an arithmetic number, because the mean of its divisors is an integer number (489679113).

Almost surely, 2^1958626361 is an apocalyptic number.

It is an amenable number.

1958626361 is a deficient number, since it is larger than the sum of its proper divisors (90091).

1958626361 is an equidigital number, since it uses as much as digits as its factorization.

1958626361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90090.

The product of its digits is 466560, while the sum is 47.

The square root of 1958626361 is about 44256.3708521157. The cubic root of 1958626361 is about 1251.1725234870.

The spelling of 1958626361 in words is "one billion, nine hundred fifty-eight million, six hundred twenty-six thousand, three hundred sixty-one".