15951970610940 has 768 divisors, whose sum is σ = 56605657006080. Its totient is φ = 3267045826560.

The previous prime is 15951970610921. The next prime is 15951970610959. The reversal of 15951970610940 is 4901607915951.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15951970610921) and next prime (15951970610959).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 25770549951 + ... + 25770550569.

It is an arithmetic number, because the mean of its divisors is an integer number (73705282560).

Almost surely, 2^{15951970610940} is an apocalyptic number.

15951970610940 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 15951970610940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28302828503040).

15951970610940 is an abundant number, since it is smaller than the sum of its proper divisors (40653686395140).

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

15951970610940 is a wasteful number, since it uses less digits than its factorization.

15951970610940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 57.

The spelling of 15951970610940 in words is "fifteen trillion, nine hundred fifty-one billion, nine hundred seventy million, six hundred ten thousand, nine hundred forty".