254128047621 has 16 divisors (see below), whose sum is σ = 387256278528. Its totient is φ = 145210950000.

The previous prime is 254128047617. The next prime is 254128047629. The reversal of 254128047621 is 126740821452.

It is not a de Polignac number, because 254128047621 - 2² = 254128047617 is a prime.

It is a super-2 number, since 2×254128047621² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254128047629) 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, 451746 + ... + 843996.

It is an arithmetic number, because the mean of its divisors is an integer number (24203517408).

Almost surely, 2^254128047621 is an apocalyptic number.

254128047621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

254128047621 is a deficient number, since it is larger than the sum of its proper divisors (133128230907).

254128047621 is a wasteful number, since it uses less digits than its factorization.

254128047621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423112.

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 254128047621 in words is "two hundred fifty-four billion, one hundred twenty-eight million, forty-seven thousand, six hundred twenty-one".