646302000661154 has 4 divisors (see below), whose sum is σ = 969453000991734. Its totient is φ = 323151000330576.

The previous prime is 646302000661147. The next prime is 646302000661267. The reversal of 646302000661154 is 451166000203646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 631198945010929 + 15103055650225 = 25123673^2 + 3886265^2 .

It is a super-2 number, since 2×646302000661154² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161575500165287 + ... + 161575500165290.

Almost surely, 2^{646302000661154} is an apocalyptic number.

646302000661154 is a deficient number, since it is larger than the sum of its proper divisors (323151000330580).

646302000661154 is a wasteful number, since it uses less digits than its factorization.

646302000661154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323151000330579.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 646302000661154 in words is "six hundred forty-six trillion, three hundred two billion, six hundred sixty-one thousand, one hundred fifty-four".