4015381645431 has 24 divisors (see below), whose sum is σ = 6246961921200. Its totient is φ = 2470682583936.

The previous prime is 4015381645339. The next prime is 4015381645447. The reversal of 4015381645431 is 1345461835104.

It is a happy number.

4015381645431 is a `hidden beast` number, since 4 + 0 + 1 + 53 + 8 + 164 + 5 + 431 = 666.

It is not a de Polignac number, because 4015381645431 - 2¹⁵ = 4015381612663 is a prime.

It is a super-2 number, since 2×4015381645431² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4015381645631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1328046 + ... + 3129611.

It is an arithmetic number, because the mean of its divisors is an integer number (260290080050).

Almost surely, 2^{4015381645431} is an apocalyptic number.

4015381645431 is a deficient number, since it is larger than the sum of its proper divisors (2231580275769).

4015381645431 is a wasteful number, since it uses less digits than its factorization.

4015381645431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4465375 (or 4465372 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 4015381645431 in words is "four trillion, fifteen billion, three hundred eighty-one million, six hundred forty-five thousand, four hundred thirty-one".