15357978912 has 48 divisors (see below), whose sum is σ = 40382828640. Its totient is φ = 5110674432.

The previous prime is 15357978887. The next prime is 15357978913. The reversal of 15357978912 is 21987975351.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×15357978912² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15357978913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77962 + ... + 191817.

It is an arithmetic number, because the mean of its divisors is an integer number (841308930).

Almost surely, 2^15357978912 is an apocalyptic number.

15357978912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15357978912 is an abundant number, since it is smaller than the sum of its proper divisors (25024849728).

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

15357978912 is a wasteful number, since it uses less digits than its factorization.

15357978912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270385 (or 270377 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 57.

The spelling of 15357978912 in words is "fifteen billion, three hundred fifty-seven million, nine hundred seventy-eight thousand, nine hundred twelve".