201564429090 has 32 divisors (see below), whose sum is σ = 504787441536. Its totient is φ = 51413535360.

The previous prime is 201564429089. The next prime is 201564429137. The reversal of 201564429090 is 90924465102.

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, 146060491 + ... + 146061870.

It is an arithmetic number, because the mean of its divisors is an integer number (15774607548).

Almost surely, 2^201564429090 is an apocalyptic number.

201564429090 is an abundant number, since it is smaller than the sum of its proper divisors (303223012446).

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

201564429090 is a wasteful number, since it uses less digits than its factorization.

201564429090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292122394.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 201564429090 in words is "two hundred one billion, five hundred sixty-four million, four hundred twenty-nine thousand, ninety".