40047473381 has 2 divisors, whose sum is σ = 40047473382. Its totient is φ = 40047473380.

The previous prime is 40047473371. The next prime is 40047473489. The reversal of 40047473381 is 18337474004.

40047473381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39756770881 + 290702500 = 199391^2 + 17050^2 .

It is a cyclic number.

It is not a de Polignac number, because 40047473381 - 2²² = 40043279077 is a prime.

It is a super-2 number, since 2×40047473381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40047473351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20023736690 + 20023736691.

It is an arithmetic number, because the mean of its divisors is an integer number (20023736691).

Almost surely, 2^40047473381 is an apocalyptic number.

It is an amenable number.

40047473381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40047473381 is an equidigital number, since it uses as much as digits as its factorization.

40047473381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 40047473381 in words is "forty billion, forty-seven million, four hundred seventy-three thousand, three hundred eighty-one".