90051131012 has 6 divisors (see below), whose sum is σ = 157589479278. Its totient is φ = 45025565504.

The previous prime is 90051130991. The next prime is 90051131021. The reversal of 90051131012 is 21013115009.

It can be written as a sum of positive squares in only one way, i.e., 64727501056 + 25323629956 = 254416^2 + 159134^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11256391373 + ... + 11256391380.

It is an arithmetic number, because the mean of its divisors is an integer number (26264913213).

Almost surely, 2^90051131012 is an apocalyptic number.

It is an amenable number.

90051131012 is a deficient number, since it is larger than the sum of its proper divisors (67538348266).

90051131012 is a wasteful number, since it uses less digits than its factorization.

90051131012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22512782757 (or 22512782755 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 23.

The spelling of 90051131012 in words is "ninety billion, fifty-one million, one hundred thirty-one thousand, twelve".