16631561254 has 32 divisors (see below), whose sum is σ = 31378461696. Its totient is φ = 6422478720.

The previous prime is 16631561249. The next prime is 16631561321. The reversal of 16631561254 is 45216513661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460462 + ... + 495265.

It is an arithmetic number, because the mean of its divisors is an integer number (980576928).

Almost surely, 2^16631561254 is an apocalyptic number.

16631561254 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16631561254 is a deficient number, since it is larger than the sum of its proper divisors (14746900442).

16631561254 is a wasteful number, since it uses less digits than its factorization.

16631561254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955860.

The product of its digits is 129600, while the sum is 40.

The spelling of 16631561254 in words is "sixteen billion, six hundred thirty-one million, five hundred sixty-one thousand, two hundred fifty-four".