201626553431 has 4 divisors (see below), whose sum is σ = 201638407872. Its totient is φ = 201614698992.

The previous prime is 201626553419. The next prime is 201626553461. The reversal of 201626553431 is 134355626102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201626553431 - 2⁶ = 201626553367 is a prime.

It is a super-2 number, since 2×201626553431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201626553461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5901671 + ... + 5935736.

It is an arithmetic number, because the mean of its divisors is an integer number (50409601968).

Almost surely, 2^201626553431 is an apocalyptic number.

201626553431 is a deficient number, since it is larger than the sum of its proper divisors (11854441).

201626553431 is a wasteful number, since it uses less digits than its factorization.

201626553431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11854440.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 201626553431 in words is "two hundred one billion, six hundred twenty-six million, five hundred fifty-three thousand, four hundred thirty-one".