1955220658 has 16 divisors (see below), whose sum is σ = 3065249880. Its totient is φ = 934166016.

The previous prime is 1955220653. The next prime is 1955220667. The reversal of 1955220658 is 8560225591.

It can be written as a sum of positive squares in 4 ways, for example, as 1287876769 + 667343889 = 35887^2 + 25833^2 .

It is not an unprimeable number, because it can be changed into a prime (1955220653) 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, 168141 + ... + 179392.

Almost surely, 2^1955220658 is an apocalyptic number.

1955220658 is a deficient number, since it is larger than the sum of its proper divisors (1110029222).

1955220658 is a wasteful number, since it uses less digits than its factorization.

1955220658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347661.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 1955220658 is about 44217.8771313142. The cubic root of 1955220658 is about 1250.4469139020.

The spelling of 1955220658 in words is "one billion, nine hundred fifty-five million, two hundred twenty thousand, six hundred fifty-eight".