1955220669 has 24 divisors (see below), whose sum is σ = 3045369600. Its totient is φ = 1204752960.

The previous prime is 1955220667. The next prime is 1955220703. The reversal of 1955220669 is 9660225591.

It is a happy number.

1955220669 is a `hidden beast` number, since 19 + 552 + 20 + 6 + 69 = 666.

1955220669 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1955220669 - 2¹ = 1955220667 is a prime.

It is a super-2 number, since 2×1955220669² = 7645775728969615122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955220667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132429 + ... + 146450.

It is an arithmetic number, because the mean of its divisors is an integer number (126890400).

Almost surely, 2^1955220669 is an apocalyptic number.

1955220669 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1955220669 is a deficient number, since it is larger than the sum of its proper divisors (1090148931).

1955220669 is a wasteful number, since it uses less digits than its factorization.

1955220669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278945 (or 278942 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 1955220669 is about 44217.8772556983. The cubic root of 1955220669 is about 1250.4469162470.

The spelling of 1955220669 in words is "one billion, nine hundred fifty-five million, two hundred twenty thousand, six hundred sixty-nine".