1671920055 has 128 divisors (see below), whose sum is σ = 3354624000. Its totient is φ = 784442880.

The previous prime is 1671920053. The next prime is 1671920057. The reversal of 1671920055 is 5500291761.

It is an interprime number because it is at equal distance from previous prime (1671920053) and next prime (1671920057).

It is not a de Polignac number, because 1671920055 - 2¹ = 1671920053 is a prime.

It is a super-2 number, since 2×1671920055² = 5590633340622406050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671920051) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4297801 + ... + 4298189.

It is an arithmetic number, because the mean of its divisors is an integer number (26208000).

Almost surely, 2^1671920055 is an apocalyptic number.

1671920055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1671920055 is an abundant number, since it is smaller than the sum of its proper divisors (1682703945).

1671920055 is a wasteful number, since it uses less digits than its factorization.

1671920055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The square root of 1671920055 is about 40889.1190293946. The cubic root of 1671920055 is about 1186.8755110570.

The spelling of 1671920055 in words is "one billion, six hundred seventy-one million, nine hundred twenty thousand, fifty-five".