155109945602 has 4 divisors (see below), whose sum is σ = 232664918406. Its totient is φ = 77554972800.

The previous prime is 155109945581. The next prime is 155109945629. The reversal of 155109945602 is 206549901551.

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

It can be written as a sum of positive squares in only one way, i.e., 138264241921 + 16845703681 = 371839^2 + 129791^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38777486399 + ... + 38777486402.

Almost surely, 2^155109945602 is an apocalyptic number.

155109945602 is a deficient number, since it is larger than the sum of its proper divisors (77554972804).

155109945602 is an equidigital number, since it uses as much as digits as its factorization.

155109945602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77554972803.

The product of its (nonzero) digits is 486000, while the sum is 47.

The spelling of 155109945602 in words is "one hundred fifty-five billion, one hundred nine million, nine hundred forty-five thousand, six hundred two".