40151785381 has 2 divisors, whose sum is σ = 40151785382. Its totient is φ = 40151785380.

The previous prime is 40151785363. The next prime is 40151785391. The reversal of 40151785381 is 18358715104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30516596100 + 9635189281 = 174690^2 + 98159^2 .

It is a cyclic number.

It is not a de Polignac number, because 40151785381 - 2⁷ = 40151785253 is a prime.

It is a super-2 number, since 2×40151785381² (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 (40151785351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20075892690 + 20075892691.

It is an arithmetic number, because the mean of its divisors is an integer number (20075892691).

Almost surely, 2^40151785381 is an apocalyptic number.

It is an amenable number.

40151785381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40151785381 is an equidigital number, since it uses as much as digits as its factorization.

40151785381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 134400, while the sum is 43.

The spelling of 40151785381 in words is "forty billion, one hundred fifty-one million, seven hundred eighty-five thousand, three hundred eighty-one".