207255551136 has 96 divisors (see below), whose sum is σ = 576310775040. Its totient is φ = 64991748096.

The previous prime is 207255551053. The next prime is 207255551143. The reversal of 207255551136 is 631155552702.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×207255551136² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3704620 + ... + 3760148.

It is an arithmetic number, because the mean of its divisors is an integer number (6003237240).

Almost surely, 2^207255551136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 207255551136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288155387520).

207255551136 is an abundant number, since it is smaller than the sum of its proper divisors (369055223904).

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

207255551136 is a wasteful number, since it uses less digits than its factorization.

207255551136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57846 (or 57838 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 42.

The spelling of 207255551136 in words is "two hundred seven billion, two hundred fifty-five million, five hundred fifty-one thousand, one hundred thirty-six".