1958906987856 has 240 divisors, whose sum is σ = 6911917608960. Its totient is φ = 504033822720.

The previous prime is 1958906987761. The next prime is 1958906987857. The reversal of 1958906987856 is 6587896098591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1958906987857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1285776 + ... + 2360303.

It is an arithmetic number, because the mean of its divisors is an integer number (28799656704).

Almost surely, 2^{1958906987856} is an apocalyptic number.

1958906987856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1958906987856 is an abundant number, since it is smaller than the sum of its proper divisors (4953010621104).

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

1958906987856 is a wasteful number, since it uses less digits than its factorization.

1958906987856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646154 (or 3646145 counting only the distinct ones).

The product of its (nonzero) digits is 2351462400, while the sum is 81.

The spelling of 1958906987856 in words is "one trillion, nine hundred fifty-eight billion, nine hundred six million, nine hundred eighty-seven thousand, eight hundred fifty-six".