154340621851 has 16 divisors (see below), whose sum is σ = 170290280160. Its totient is φ = 138974388480.

The previous prime is 154340621839. The next prime is 154340621881. The reversal of 154340621851 is 158126043451.

It is a cyclic number.

It is not a de Polignac number, because 154340621851 - 2³⁵ = 119980883483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (154340621821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5124705 + ... + 5154733.

It is an arithmetic number, because the mean of its divisors is an integer number (10643142510).

Almost surely, 2^154340621851 is an apocalyptic number.

154340621851 is a deficient number, since it is larger than the sum of its proper divisors (15949658309).

154340621851 is a wasteful number, since it uses less digits than its factorization.

154340621851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39726.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 154340621851 in words is "one hundred fifty-four billion, three hundred forty million, six hundred twenty-one thousand, eight hundred fifty-one".