628351923654 has 288 divisors, whose sum is σ = 1830630896640. Its totient is φ = 153830928384.

The previous prime is 628351923653. The next prime is 628351923691. The reversal of 628351923654 is 456329153826.

It is a happy number.

628351923654 is a `hidden beast` number, since 6 + 2 + 8 + 351 + 9 + 236 + 54 = 666.

It is a super-2 number, since 2×628351923654² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 628351923654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628351923653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 14207227 + ... + 14251385.

It is an arithmetic number, because the mean of its divisors is an integer number (6356357280).

Almost surely, 2^628351923654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628351923654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915315448320).

628351923654 is an abundant number, since it is smaller than the sum of its proper divisors (1202278972986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628351923654 is a wasteful number, since it uses less digits than its factorization.

628351923654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44284 (or 44274 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 54.

The spelling of 628351923654 in words is "six hundred twenty-eight billion, three hundred fifty-one million, nine hundred twenty-three thousand, six hundred fifty-four".