15720772552505 has 8 divisors (see below), whose sum is σ = 18864993518592. Its totient is φ = 12576573738288.

The previous prime is 15720772552493. The next prime is 15720772552519. The reversal of 15720772552505 is 50525527702751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15720772552505 - 2⁸ = 15720772552249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3934457 + ... + 6849926.

It is an arithmetic number, because the mean of its divisors is an integer number (2358124189824).

Almost surely, 2^{15720772552505} is an apocalyptic number.

It is an amenable number.

15720772552505 is a deficient number, since it is larger than the sum of its proper divisors (3144220966087).

15720772552505 is a wasteful number, since it uses less digits than its factorization.

15720772552505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11075935.

The product of its (nonzero) digits is 8575000, while the sum is 53.

The spelling of 15720772552505 in words is "fifteen trillion, seven hundred twenty billion, seven hundred seventy-two million, five hundred fifty-two thousand, five hundred five".