209155470100 has 36 divisors (see below), whose sum is σ = 464422434784. Its totient is φ = 81716554080.

The previous prime is 209155470037. The next prime is 209155470101. The reversal of 209155470100 is 1074551902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209155470101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24316104 + ... + 24324703.

Almost surely, 2^209155470100 is an apocalyptic number.

209155470100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209155470100 is an abundant number, since it is smaller than the sum of its proper divisors (255266964684).

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

209155470100 is a wasteful number, since it uses less digits than its factorization.

209155470100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48640864 (or 48640857 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 34.

The spelling of 209155470100 in words is "two hundred nine billion, one hundred fifty-five million, four hundred seventy thousand, one hundred".