1949642655 has 16 divisors (see below), whose sum is σ = 3170567904. Its totient is φ = 1022762880.

The previous prime is 1949642641. The next prime is 1949642663. The reversal of 1949642655 is 5562469491.

It is not a de Polignac number, because 1949642655 - 2⁹ = 1949642143 is a prime.

It is a super-2 number, since 2×1949642655² = 7602212964390898050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1949642598 and 1949642607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1064464 + ... + 1066293.

It is an arithmetic number, because the mean of its divisors is an integer number (198160494).

Almost surely, 2^1949642655 is an apocalyptic number.

1949642655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1949642655 is a deficient number, since it is larger than the sum of its proper divisors (1220925249).

1949642655 is a wasteful number, since it uses less digits than its factorization.

1949642655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130826.

The product of its digits is 2332800, while the sum is 51.

The square root of 1949642655 is about 44154.7580108871. The cubic root of 1949642655 is about 1249.2566577748.

The spelling of 1949642655 in words is "one billion, nine hundred forty-nine million, six hundred forty-two thousand, six hundred fifty-five".