201258742434 has 32 divisors (see below), whose sum is σ = 412962373440. Its totient is φ = 65365558272.

The previous prime is 201258742417. The next prime is 201258742457. The reversal of 201258742434 is 434247852102.

It is a happy number.

It is a super-2 number, since 2×201258742434² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

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, 2475607 + ... + 2555610.

It is an arithmetic number, because the mean of its divisors is an integer number (12905074170).

Almost surely, 2^201258742434 is an apocalyptic number.

201258742434 is an abundant number, since it is smaller than the sum of its proper divisors (211703631006).

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

201258742434 is a wasteful number, since it uses less digits than its factorization.

201258742434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031394.

The product of its (nonzero) digits is 430080, while the sum is 42.

The spelling of 201258742434 in words is "two hundred one billion, two hundred fifty-eight million, seven hundred forty-two thousand, four hundred thirty-four".