1591031299968 has 480 divisors, whose sum is σ = 5478459525000. Its totient is φ = 456748554240.

The previous prime is 1591031299943. The next prime is 1591031299993. The reversal of 1591031299968 is 8699921301951.

1591031299968 is a `hidden beast` number, since 1 + 591 + 0 + 31 + 2 + 9 + 9 + 9 + 6 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1591031299943) and next prime (1591031299993).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 23802658 + ... + 23869406.

Almost surely, 2^{1591031299968} is an apocalyptic number.

1591031299968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1591031299968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2739229762500).

1591031299968 is an abundant number, since it is smaller than the sum of its proper divisors (3887428225032).

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

1591031299968 is a wasteful number, since it uses less digits than its factorization.

1591031299968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66816 (or 66784 counting only the distinct ones).

The product of its (nonzero) digits is 9447840, while the sum is 63.

The spelling of 1591031299968 in words is "one trillion, five hundred ninety-one billion, thirty-one million, two hundred ninety-nine thousand, nine hundred sixty-eight".