155709506620 has 48 divisors (see below), whose sum is σ = 337087588320. Its totient is φ = 60389369856.

The previous prime is 155709506611. The next prime is 155709506633. The reversal of 155709506620 is 26605907551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817677 + ... + 989956.

It is an arithmetic number, because the mean of its divisors is an integer number (7022658090).

Almost surely, 2^155709506620 is an apocalyptic number.

155709506620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155709506620 is an abundant number, since it is smaller than the sum of its proper divisors (181378081700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155709506620 is a wasteful number, since it uses less digits than its factorization.

155709506620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807774 (or 1807772 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 46.

The spelling of 155709506620 in words is "one hundred fifty-five billion, seven hundred nine million, five hundred six thousand, six hundred twenty".