1958251964440 has 16 divisors (see below), whose sum is σ = 4406066920080. Its totient is φ = 783300785760.

The previous prime is 1958251964401. The next prime is 1958251964443. The reversal of 1958251964440 is 444691528591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1958251964443) 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, 24478149516 + ... + 24478149595.

It is an arithmetic number, because the mean of its divisors is an integer number (275379182505).

Almost surely, 2^{1958251964440} is an apocalyptic number.

1958251964440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1958251964440 is an abundant number, since it is smaller than the sum of its proper divisors (2447814955640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1958251964440 is a wasteful number, since it uses less digits than its factorization.

1958251964440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48956299122 (or 48956299118 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 58.

The spelling of 1958251964440 in words is "one trillion, nine hundred fifty-eight billion, two hundred fifty-one million, nine hundred sixty-four thousand, four hundred forty".