15765494461 has 4 divisors (see below), whose sum is σ = 15766980352. Its totient is φ = 15764008572.

The previous prime is 15765494441. The next prime is 15765494471. The reversal of 15765494461 is 16449456751.

It is a happy number.

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 15765494461 - 2¹⁵ = 15765461693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15765494399 and 15765494408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15765494401) 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, 726915 + ... + 748288.

It is an arithmetic number, because the mean of its divisors is an integer number (3941745088).

Almost surely, 2^15765494461 is an apocalyptic number.

It is an amenable number.

15765494461 is a deficient number, since it is larger than the sum of its proper divisors (1485891).

15765494461 is a wasteful number, since it uses less digits than its factorization.

15765494461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485890.

The product of its digits is 3628800, while the sum is 52.

The spelling of 15765494461 in words is "fifteen billion, seven hundred sixty-five million, four hundred ninety-four thousand, four hundred sixty-one".