154143466634 has 4 divisors (see below), whose sum is σ = 231215199954. Its totient is φ = 77071733316.

The previous prime is 154143466613. The next prime is 154143466639. The reversal of 154143466634 is 436664341451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 436664341451 = 13 ⋅33589564727.

It can be written as a sum of positive squares in only one way, i.e., 143150992609 + 10992474025 = 378353^2 + 104845^2 .

It is not an unprimeable number, because it can be changed into a prime (154143466639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38535866657 + ... + 38535866660.

Almost surely, 2^154143466634 is an apocalyptic number.

154143466634 is a deficient number, since it is larger than the sum of its proper divisors (77071733320).

154143466634 is an equidigital number, since it uses as much as digits as its factorization.

154143466634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77071733319.

The product of its digits is 2488320, while the sum is 47.

The spelling of 154143466634 in words is "one hundred fifty-four billion, one hundred forty-three million, four hundred sixty-six thousand, six hundred thirty-four".