905951981942 has 48 divisors (see below), whose sum is σ = 1659444848640. Its totient is φ = 369371898000.

The previous prime is 905951981939. The next prime is 905951982059. The reversal of 905951981942 is 249189159509.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2347934 + ... + 2706417.

It is an arithmetic number, because the mean of its divisors is an integer number (34571767680).

Almost surely, 2^905951981942 is an apocalyptic number.

905951981942 is a deficient number, since it is larger than the sum of its proper divisors (753492866698).

905951981942 is a wasteful number, since it uses less digits than its factorization.

905951981942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5054457 (or 5054450 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 62.

The spelling of 905951981942 in words is "nine hundred five billion, nine hundred fifty-one million, nine hundred eighty-one thousand, nine hundred forty-two".