16263531465 has 16 divisors (see below), whose sum is σ = 26165420736. Its totient is φ = 8625960000.

The previous prime is 16263531443. The next prime is 16263531467. The reversal of 16263531465 is 56413536261.

It is not a de Polignac number, because 16263531465 - 2¹² = 16263527369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16263531467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2992411 + ... + 2997840.

It is an arithmetic number, because the mean of its divisors is an integer number (1635338796).

Almost surely, 2^16263531465 is an apocalyptic number.

16263531465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16263531465 is a deficient number, since it is larger than the sum of its proper divisors (9901889271).

16263531465 is a wasteful number, since it uses less digits than its factorization.

16263531465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5990440.

The product of its digits is 388800, while the sum is 42.

The spelling of 16263531465 in words is "sixteen billion, two hundred sixty-three million, five hundred thirty-one thousand, four hundred sixty-five".