1958649640859 has 16 divisors (see below), whose sum is σ = 1988857801728. Its totient is φ = 1928677911552.

The previous prime is 1958649640813. The next prime is 1958649640867. The reversal of 1958649640859 is 9580469468591.

It is a cyclic number.

It is not a de Polignac number, because 1958649640859 - 2³² = 1954354673563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1958649640879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168364307 + ... + 168375939.

It is an arithmetic number, because the mean of its divisors is an integer number (124303612608).

Almost surely, 2^{1958649640859} is an apocalyptic number.

1958649640859 is a deficient number, since it is larger than the sum of its proper divisors (30208160869).

1958649640859 is a wasteful number, since it uses less digits than its factorization.

1958649640859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21574.

The product of its (nonzero) digits is 671846400, while the sum is 74.

The spelling of 1958649640859 in words is "one trillion, nine hundred fifty-eight billion, six hundred forty-nine million, six hundred forty thousand, eight hundred fifty-nine".