2009155570 has 64 divisors (see below), whose sum is σ = 4100751360. Its totient is φ = 704721600.

The previous prime is 2009155559. The next prime is 2009155609. The reversal of 2009155570 is 755519002.

It is a super-2 number, since 2×2009155570² = 8073412208924049800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128055 + ... + 142885.

It is an arithmetic number, because the mean of its divisors is an integer number (64074240).

Almost surely, 2^2009155570 is an apocalyptic number.

2009155570 is an abundant number, since it is smaller than the sum of its proper divisors (2091595790).

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

2009155570 is a wasteful number, since it uses less digits than its factorization.

2009155570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14911.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 2009155570 is about 44823.6050535876. The cubic root of 2009155570 is about 1261.8406728886.

The spelling of 2009155570 in words is "two billion, nine million, one hundred fifty-five thousand, five hundred seventy".