16400073631 has 2 divisors, whose sum is σ = 16400073632. Its totient is φ = 16400073630.

The previous prime is 16400073593. The next prime is 16400073643. The reversal of 16400073631 is 13637000461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16400073631 - 2²¹ = 16397976479 is a prime.

It is a super-2 number, since 2×16400073631² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16400073593 and 16400073602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16400073661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200036815 + 8200036816.

It is an arithmetic number, because the mean of its divisors is an integer number (8200036816).

Almost surely, 2^16400073631 is an apocalyptic number.

16400073631 is a deficient number, since it is larger than the sum of its proper divisors (1).

16400073631 is an equidigital number, since it uses as much as digits as its factorization.

16400073631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The spelling of 16400073631 in words is "sixteen billion, four hundred million, seventy-three thousand, six hundred thirty-one".