155036643400 has 24 divisors (see below), whose sum is σ = 360460196370. Its totient is φ = 62014657280.

The previous prime is 155036643343. The next prime is 155036643413. The reversal of 155036643400 is 4346630551.

It can be written as a sum of positive squares in 3 ways, for example, as 64932213124 + 90104430276 = 254818^2 + 300174^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 155036643400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 387591409 + ... + 387591808.

Almost surely, 2^155036643400 is an apocalyptic number.

155036643400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155036643400 is an abundant number, since it is smaller than the sum of its proper divisors (205423552970).

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

155036643400 is a wasteful number, since it uses less digits than its factorization.

155036643400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775183233 (or 775183224 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 155036643400 in words is "one hundred fifty-five billion, thirty-six million, six hundred forty-three thousand, four hundred".