1955438534 has 32 divisors (see below), whose sum is σ = 3416428800. Its totient is φ = 822045600.

The previous prime is 1955438533. The next prime is 1955438539. The reversal of 1955438534 is 4358345591.

It is a super-4 number, since 4×1955438534⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955438531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418109 + ... + 422759.

It is an arithmetic number, because the mean of its divisors is an integer number (106763400).

Almost surely, 2^1955438534 is an apocalyptic number.

1955438534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1955438534 is a deficient number, since it is larger than the sum of its proper divisors (1460990266).

1955438534 is a wasteful number, since it uses less digits than its factorization.

1955438534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5228.

The product of its digits is 1296000, while the sum is 47.

The square root of 1955438534 is about 44220.3407268646. The cubic root of 1955438534 is about 1250.4933591718.

The spelling of 1955438534 in words is "one billion, nine hundred fifty-five million, four hundred thirty-eight thousand, five hundred thirty-four".