1641955770 has 96 divisors (see below), whose sum is σ = 5254284672. Its totient is φ = 346432896.

The previous prime is 1641955759. The next prime is 1641955811. The reversal of 1641955770 is 775591461.

1641955770 is a `hidden beast` number, since 1 + 64 + 19 + 5 + 577 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92052 + ... + 108431.

It is an arithmetic number, because the mean of its divisors is an integer number (54732132).

Almost surely, 2^1641955770 is an apocalyptic number.

1641955770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1641955770 is an abundant number, since it is smaller than the sum of its proper divisors (3612328902).

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

1641955770 is a wasteful number, since it uses less digits than its factorization.

1641955770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200516 (or 200513 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The square root of 1641955770 is about 40521.0534167117. The cubic root of 1641955770 is about 1179.7422998487.

The spelling of 1641955770 in words is "one billion, six hundred forty-one million, nine hundred fifty-five thousand, seven hundred seventy".