202540505434 has 8 divisors (see below), whose sum is σ = 303813341748. Its totient is φ = 101269391520.

The previous prime is 202540505429. The next prime is 202540505441. The reversal of 202540505434 is 434505045202.

It can be written as a sum of positive squares in 2 ways, for example, as 201892955625 + 647549809 = 449325^2 + 25447^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 202540505434.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79297 + ... + 641380.

Almost surely, 2^202540505434 is an apocalyptic number.

202540505434 is a deficient number, since it is larger than the sum of its proper divisors (101272836314).

202540505434 is a wasteful number, since it uses less digits than its factorization.

202540505434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861200.

The product of its (nonzero) digits is 96000, while the sum is 34.

The spelling of 202540505434 in words is "two hundred two billion, five hundred forty million, five hundred five thousand, four hundred thirty-four".