641154355044 has 72 divisors (see below), whose sum is σ = 1749387806208. Its totient is φ = 182227832640.

The previous prime is 641154355031. The next prime is 641154355073. The reversal of 641154355044 is 440553451146.

641154355044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641154355044² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 641154354987 and 641154355005.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2742139 + ... + 2966754.

It is an arithmetic number, because the mean of its divisors is an integer number (24297052864).

Almost surely, 2^641154355044 is an apocalyptic number.

It is an amenable number.

641154355044 is an abundant number, since it is smaller than the sum of its proper divisors (1108233451164).

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

641154355044 is a wasteful number, since it uses less digits than its factorization.

641154355044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5709105 (or 5709096 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 641154355044 in words is "six hundred forty-one billion, one hundred fifty-four million, three hundred fifty-five thousand, forty-four".