15971445340 has 24 divisors (see below), whose sum is σ = 33636706992. Its totient is φ = 6370164480.

The previous prime is 15971445331. The next prime is 15971445349. The reversal of 15971445340 is 4354417951.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15971445331) and next prime (15971445349).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15971445349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143741 + ... + 1157620.

It is an arithmetic number, because the mean of its divisors is an integer number (1401529458).

Almost surely, 2^15971445340 is an apocalyptic number.

15971445340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15971445340 is an abundant number, since it is smaller than the sum of its proper divisors (17665261652).

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

15971445340 is a wasteful number, since it uses less digits than its factorization.

15971445340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301717 (or 2301715 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 15971445340 in words is "fifteen billion, nine hundred seventy-one million, four hundred forty-five thousand, three hundred forty".