40605401731 has 4 divisors (see below), whose sum is σ = 42993954792. Its totient is φ = 38216848672.

The previous prime is 40605401723. The next prime is 40605401737. The reversal of 40605401731 is 13710450604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40605401731 - 2³ = 40605401723 is a prime.

It is a super-2 number, since 2×40605401731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40605401693 and 40605401702.

It is not an unprimeable number, because it can be changed into a prime (40605401737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194276505 + ... + 1194276538.

It is an arithmetic number, because the mean of its divisors is an integer number (10748488698).

Almost surely, 2^40605401731 is an apocalyptic number.

40605401731 is a deficient number, since it is larger than the sum of its proper divisors (2388553061).

40605401731 is a wasteful number, since it uses less digits than its factorization.

40605401731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388553060.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 40605401731 in words is "forty billion, six hundred five million, four hundred one thousand, seven hundred thirty-one".