641546513026154 has 16 divisors (see below), whose sum is σ = 995510669423400. Its totient is φ = 309709788986304.

The previous prime is 641546513026129. The next prime is 641546513026171. The reversal of 641546513026154 is 451620315645146.

It can be written as a sum of positive squares in 4 ways, for example, as 146903247733225 + 494643265292929 = 12120365^2 + 22240577^2 .

It is a junction number, because it is equal to n+sod(n) for n = 641546513026096 and 641546513026105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33622337 + ... + 49127940.

Almost surely, 2^{641546513026154} is an apocalyptic number.

641546513026154 is a deficient number, since it is larger than the sum of its proper divisors (353964156397246).

641546513026154 is a wasteful number, since it uses less digits than its factorization.

641546513026154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82883977.

The product of its (nonzero) digits is 10368000, while the sum is 53.

The spelling of 641546513026154 in words is "six hundred forty-one trillion, five hundred forty-six billion, five hundred thirteen million, twenty-six thousand, one hundred fifty-four".