16121661454 has 8 divisors (see below), whose sum is σ = 24185193480. Its totient is φ = 8059930296.

The previous prime is 16121661419. The next prime is 16121661473. The reversal of 16121661454 is 45416612161.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427609 + ... + 463780.

It is an arithmetic number, because the mean of its divisors is an integer number (3023149185).

Almost surely, 2^16121661454 is an apocalyptic number.

16121661454 is a deficient number, since it is larger than the sum of its proper divisors (8063532026).

16121661454 is an equidigital number, since it uses as much as digits as its factorization.

16121661454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900434.

The product of its digits is 34560, while the sum is 37.

The spelling of 16121661454 in words is "sixteen billion, one hundred twenty-one million, six hundred sixty-one thousand, four hundred fifty-four".