9957051906 has 16 divisors (see below), whose sum is σ = 19919905824. Its totient is φ = 3318050304.

The previous prime is 9957051901. The next prime is 9957051917. The reversal of 9957051906 is 6091507599.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9957051901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219280 + ... + 260763.

It is an arithmetic number, because the mean of its divisors is an integer number (1244994114).

Almost surely, 2^9957051906 is an apocalyptic number.

9957051906 is an abundant number, since it is smaller than the sum of its proper divisors (9962853918).

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

9957051906 is a wasteful number, since it uses less digits than its factorization.

9957051906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483505.

The product of its (nonzero) digits is 765450, while the sum is 51.

The square root of 9957051906 is about 99785.0284661983. The cubic root of 9957051906 is about 2151.3459685264.

The spelling of 9957051906 in words is "nine billion, nine hundred fifty-seven million, fifty-one thousand, nine hundred six".