16265551501 has 4 divisors (see below), whose sum is σ = 16323027232. Its totient is φ = 16208075772.

The previous prime is 16265551469. The next prime is 16265551507. The reversal of 16265551501 is 10515556261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16265551501 - 2⁵ = 16265551469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16265551507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28737441 + ... + 28738006.

It is an arithmetic number, because the mean of its divisors is an integer number (4080756808).

Almost surely, 2^16265551501 is an apocalyptic number.

It is an amenable number.

16265551501 is a deficient number, since it is larger than the sum of its proper divisors (57475731).

16265551501 is an equidigital number, since it uses as much as digits as its factorization.

16265551501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57475730.

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 16265551501 in words is "sixteen billion, two hundred sixty-five million, five hundred fifty-one thousand, five hundred one".