1901099955 has 16 divisors (see below), whose sum is σ = 3139881984. Its totient is φ = 981212640.

The previous prime is 1901099939. The next prime is 1901099989. The reversal of 1901099955 is 5599901091.

It is a happy number.

It is not a de Polignac number, because 1901099955 - 2⁴ = 1901099939 is a prime.

It is a super-2 number, since 2×1901099955² = 7228362077802004050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2043729 + ... + 2044658.

It is an arithmetic number, because the mean of its divisors is an integer number (196242624).

Almost surely, 2^1901099955 is an apocalyptic number.

1901099955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1901099955 is a deficient number, since it is larger than the sum of its proper divisors (1238782029).

1901099955 is a wasteful number, since it uses less digits than its factorization.

1901099955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088426.

The product of its (nonzero) digits is 164025, while the sum is 48.

The square root of 1901099955 is about 43601.6049589920. The cubic root of 1901099955 is about 1238.8012945443.

The spelling of 1901099955 in words is "one billion, nine hundred one million, ninety-nine thousand, nine hundred fifty-five".