1601044731 has 128 divisors (see below), whose sum is σ = 2935296000. Its totient is φ = 849139200.

The previous prime is 1601044729. The next prime is 1601044741. The reversal of 1601044731 is 1374401061.

It is a happy number.

It is not a de Polignac number, because 1601044731 - 2¹ = 1601044729 is a prime.

It is a super-2 number, since 2×1601044731² = 5126688461325724722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1601044695 and 1601044704.

It is not an unprimeable number, because it can be changed into a prime (1601044741) 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, 8845461 + ... + 8845641.

It is an arithmetic number, because the mean of its divisors is an integer number (22932000).

Almost surely, 2^1601044731 is an apocalyptic number.

1601044731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1601044731 is a deficient number, since it is larger than the sum of its proper divisors (1334251269).

1601044731 is a wasteful number, since it uses less digits than its factorization.

1601044731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1601044731 is about 40013.0570064323. The cubic root of 1601044731 is about 1169.8616075626.

Adding to 1601044731 its reverse (1374401061), we get a palindrome (2975445792).

The spelling of 1601044731 in words is "one billion, six hundred one million, forty-four thousand, seven hundred thirty-one".