154961633109 has 4 divisors (see below), whose sum is σ = 206615510816. Its totient is φ = 103307755404.

The previous prime is 154961633069. The next prime is 154961633149. The reversal of 154961633109 is 901336169451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (154961633069) and next prime (154961633149).

It is not a de Polignac number, because 154961633109 - 2⁸ = 154961632853 is a prime.

It is a super-3 number, since 3×154961633109³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154961633149) 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, 25826938849 + ... + 25826938854.

It is an arithmetic number, because the mean of its divisors is an integer number (51653877704).

Almost surely, 2^154961633109 is an apocalyptic number.

It is an amenable number.

154961633109 is a deficient number, since it is larger than the sum of its proper divisors (51653877707).

154961633109 is an equidigital number, since it uses as much as digits as its factorization.

154961633109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51653877706.

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 154961633109 in words is "one hundred fifty-four billion, nine hundred sixty-one million, six hundred thirty-three thousand, one hundred nine".