1009157816 has 8 divisors (see below), whose sum is σ = 1892170920. Its totient is φ = 504578904.

The previous prime is 1009157777. The next prime is 1009157837. The reversal of 1009157816 is 6187519001.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1009157816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63072356 + ... + 63072371.

It is an arithmetic number, because the mean of its divisors is an integer number (236521365).

Almost surely, 2^1009157816 is an apocalyptic number.

It is an amenable number.

1009157816 is a deficient number, since it is larger than the sum of its proper divisors (883013104).

1009157816 is a wasteful number, since it uses less digits than its factorization.

1009157816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126144733 (or 126144729 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 1009157816 is about 31767.2443878911. The cubic root of 1009157816 is about 1003.0433340555.

The spelling of 1009157816 in words is "one billion, nine million, one hundred fifty-seven thousand, eight hundred sixteen".