1298955354840 has 2304 divisors, whose sum is σ = 5682924748800. Its totient is φ = 253609574400.

The previous prime is 1298955354787. The next prime is 1298955354841. The reversal of 1298955354840 is 484535598921.

1298955354840 is a `hidden beast` number, since 1 + 2 + 9 + 8 + 95 + 535 + 4 + 8 + 4 + 0 = 666.

It is a super-2 number, since 2×1298955354840² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298955354841) by changing a digit.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 10227994857 + ... + 10227994983.

It is an arithmetic number, because the mean of its divisors is an integer number (2466547200).

Almost surely, 2^{1298955354840} is an apocalyptic number.

1298955354840 is a gapful number since it is divisible by the number (10) 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 1298955354840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2841462374400).

1298955354840 is an abundant number, since it is smaller than the sum of its proper divisors (4383969393960).

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

1298955354840 is a wasteful number, since it uses less digits than its factorization.

1298955354840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 62208000, while the sum is 63.

The spelling of 1298955354840 in words is "one trillion, two hundred ninety-eight billion, nine hundred fifty-five million, three hundred fifty-four thousand, eight hundred forty".