90506022550 has 24 divisors (see below), whose sum is σ = 168349700376. Its totient is φ = 36200581440.

The previous prime is 90506022547. The next prime is 90506022553. The reversal of 90506022550 is 5522060509.

It is an interprime number because it is at equal distance from previous prime (90506022547) and next prime (90506022553).

It is a super-2 number, since 2×90506022550² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90506022553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1420477 + ... + 1482823.

It is an arithmetic number, because the mean of its divisors is an integer number (7014570849).

Almost surely, 2^90506022550 is an apocalyptic number.

90506022550 is a deficient number, since it is larger than the sum of its proper divisors (77843677826).

90506022550 is a wasteful number, since it uses less digits than its factorization.

90506022550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91392 (or 91387 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 90506022550 in words is "ninety billion, five hundred six million, twenty-two thousand, five hundred fifty".