154869009157 has 4 divisors (see below), whose sum is σ = 154968990700. Its totient is φ = 154769027616.

The previous prime is 154869009151. The next prime is 154869009259. The reversal of 154869009157 is 751900968451.

It is a happy number.

It is a Cunningham number, because it is equal to 393534²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52397956836 + 102471052321 = 228906^2 + 320111^2 .

It is a cyclic number.

It is not a de Polignac number, because 154869009157 - 2³ = 154869009149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154869009098 and 154869009107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154869009151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49988448 + ... + 49991545.

It is an arithmetic number, because the mean of its divisors is an integer number (38742247675).

Almost surely, 2^154869009157 is an apocalyptic number.

It is an amenable number.

154869009157 is a deficient number, since it is larger than the sum of its proper divisors (99981543).

154869009157 is an equidigital number, since it uses as much as digits as its factorization.

154869009157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99981542.

The product of its (nonzero) digits is 2721600, while the sum is 55.

The spelling of 154869009157 in words is "one hundred fifty-four billion, eight hundred sixty-nine million, nine thousand, one hundred fifty-seven".