153799989778 has 8 divisors (see below), whose sum is σ = 230711411772. Its totient is φ = 76896185856.

The previous prime is 153799989751. The next prime is 153799989779. The reversal of 153799989778 is 877989997351.

It can be written as a sum of positive squares in 2 ways, for example, as 151894929169 + 1905060609 = 389737^2 + 43647^2 .

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

It is not an unprimeable number, because it can be changed into a prime (153799989779) 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, 1853775 + ... + 1934962.

Almost surely, 2^153799989778 is an apocalyptic number.

153799989778 is a deficient number, since it is larger than the sum of its proper divisors (76911421994).

153799989778 is a wasteful number, since it uses less digits than its factorization.

153799989778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3809036.

The product of its digits is 2160406080, while the sum is 82.

The spelling of 153799989778 in words is "one hundred fifty-three billion, seven hundred ninety-nine million, nine hundred eighty-nine thousand, seven hundred seventy-eight".