154640060206521 has 8 divisors (see below), whose sum is σ = 206186849794464. Its totient is φ = 103093322044800.

The previous prime is 154640060206493. The next prime is 154640060206523. The reversal of 154640060206521 is 125602060046451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 154640060206521 - 2¹³ = 154640060198329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (154640060206523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5186455 + ... + 18335196.

It is an arithmetic number, because the mean of its divisors is an integer number (25773356224308).

Almost surely, 2^{154640060206521} is an apocalyptic number.

It is an amenable number.

154640060206521 is a deficient number, since it is larger than the sum of its proper divisors (51546789587943).

154640060206521 is a wasteful number, since it uses less digits than its factorization.

154640060206521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25713111.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 154640060206521 in words is "one hundred fifty-four trillion, six hundred forty billion, sixty million, two hundred six thousand, five hundred twenty-one".