1845155949 has 64 divisors (see below), whose sum is σ = 3213557760. Its totient is φ = 914457600.

The previous prime is 1845155941. The next prime is 1845155951. The reversal of 1845155949 is 9495515481.

It is not a de Polignac number, because 1845155949 - 2³ = 1845155941 is a prime.

It is a super-2 number, since 2×1845155949² = 6809200952260181202, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1845155941) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 657349 + ... + 660149.

It is an arithmetic number, because the mean of its divisors is an integer number (50211840).

Almost surely, 2^1845155949 is an apocalyptic number.

1845155949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1845155949 is a deficient number, since it is larger than the sum of its proper divisors (1368401811).

1845155949 is a wasteful number, since it uses less digits than its factorization.

1845155949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970.

The product of its digits is 1296000, while the sum is 51.

The square root of 1845155949 is about 42955.2784765737. The cubic root of 1845155949 is about 1226.5286370547.

The spelling of 1845155949 in words is "one billion, eight hundred forty-five million, one hundred fifty-five thousand, nine hundred forty-nine".