15780215261472 has 48 divisors (see below), whose sum is σ = 41631221217600. Its totient is φ = 5233639226112.

The previous prime is 15780215261453. The next prime is 15780215261527. The reversal of 15780215261472 is 27416251208751.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412989043 + ... + 413027250.

It is an arithmetic number, because the mean of its divisors is an integer number (867317108700).

Almost surely, 2^{15780215261472} is an apocalyptic number.

15780215261472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15780215261472 is an abundant number, since it is smaller than the sum of its proper divisors (25851005956128).

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

15780215261472 is a wasteful number, since it uses less digits than its factorization.

15780215261472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826016505 (or 826016497 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 51.

The spelling of 15780215261472 in words is "fifteen trillion, seven hundred eighty billion, two hundred fifteen million, two hundred sixty-one thousand, four hundred seventy-two".