1958840061 has 32 divisors (see below), whose sum is σ = 2757888000. Its totient is φ = 1234876608.

The previous prime is 1958840021. The next prime is 1958840069. The reversal of 1958840061 is 1600488591.

It is not a de Polignac number, because 1958840061 - 2⁷ = 1958839933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1958839995 and 1958840022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1958840069) 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 31 ways as a sum of consecutive naturals, for example, 1842216 + ... + 1843278.

It is an arithmetic number, because the mean of its divisors is an integer number (86184000).

Almost surely, 2^1958840061 is an apocalyptic number.

It is an amenable number.

1958840061 is a deficient number, since it is larger than the sum of its proper divisors (799047939).

1958840061 is a wasteful number, since it uses less digits than its factorization.

1958840061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 1958840061 is about 44258.7851279269. The cubic root of 1958840061 is about 1251.2180257584.

The spelling of 1958840061 in words is "one billion, nine hundred fifty-eight million, eight hundred forty thousand, sixty-one".