155212643830 has 16 divisors (see below), whose sum is σ = 279388950480. Its totient is φ = 62083681632.

The previous prime is 155212643821. The next prime is 155212643879. The reversal of 155212643830 is 38346212551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388912 + ... + 679468.

It is an arithmetic number, because the mean of its divisors is an integer number (17461809405).

Almost surely, 2^155212643830 is an apocalyptic number.

155212643830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155212643830 is a deficient number, since it is larger than the sum of its proper divisors (124176306650).

155212643830 is a wasteful number, since it uses less digits than its factorization.

155212643830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343983.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 155212643830 in words is "one hundred fifty-five billion, two hundred twelve million, six hundred forty-three thousand, eight hundred thirty".