4072155644 has 6 divisors (see below), whose sum is σ = 7126272384. Its totient is φ = 2036077820.

The previous prime is 4072155641. The next prime is 4072155653. The reversal of 4072155644 is 4465512704.

It is a happy number.

It is a super-2 number, since 2×4072155644² = 33164903177922109472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4072155598 and 4072155607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4072155641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509019452 + ... + 509019459.

It is an arithmetic number, because the mean of its divisors is an integer number (1187712064).

Almost surely, 2^4072155644 is an apocalyptic number.

It is an amenable number.

4072155644 is a deficient number, since it is larger than the sum of its proper divisors (3054116740).

4072155644 is a wasteful number, since it uses less digits than its factorization.

4072155644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018038915 (or 1018038913 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 38.

The square root of 4072155644 is about 63813.4440694122. Note that the first 3 decimals coincide. The cubic root of 4072155644 is about 1596.8892219780.

The spelling of 4072155644 in words is "four billion, seventy-two million, one hundred fifty-five thousand, six hundred forty-four".