400078103651 has 2 divisors, whose sum is σ = 400078103652. Its totient is φ = 400078103650.

The previous prime is 400078103627. The next prime is 400078103653. The reversal of 400078103651 is 156301870004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400078103651 - 2¹⁴ = 400078087267 is a prime.

Together with 400078103653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400078103653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200039051825 + 200039051826.

It is an arithmetic number, because the mean of its divisors is an integer number (200039051826).

Almost surely, 2^400078103651 is an apocalyptic number.

400078103651 is a deficient number, since it is larger than the sum of its proper divisors (1).

400078103651 is an equidigital number, since it uses as much as digits as its factorization.

400078103651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

Adding to 400078103651 its reverse (156301870004), we get a palindrome (556379973655).

The spelling of 400078103651 in words is "four hundred billion, seventy-eight million, one hundred three thousand, six hundred fifty-one".