400151649881 has 2 divisors, whose sum is σ = 400151649882. Its totient is φ = 400151649880.

The previous prime is 400151649787. The next prime is 400151650013. The reversal of 400151649881 is 188946151004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225169230400 + 174982419481 = 474520^2 + 418309^2 .

It is a cyclic number.

It is not a de Polignac number, because 400151649881 - 2¹⁸ = 400151387737 is a prime.

It is a super-2 number, since 2×400151649881² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (400151649581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200075824940 + 200075824941.

It is an arithmetic number, because the mean of its divisors is an integer number (200075824941).

Almost surely, 2^400151649881 is an apocalyptic number.

It is an amenable number.

400151649881 is a deficient number, since it is larger than the sum of its proper divisors (1).

400151649881 is an equidigital number, since it uses as much as digits as its factorization.

400151649881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 400151649881 in words is "four hundred billion, one hundred fifty-one million, six hundred forty-nine thousand, eight hundred eighty-one".