400611663154007 has 4 divisors (see below), whose sum is σ = 400652781060000. Its totient is φ = 400570545248016.

The previous prime is 400611663153983. The next prime is 400611663154067. The reversal of 400611663154007 is 700451366116004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400611663154007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400611663154067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20558938382 + ... + 20558957867.

It is an arithmetic number, because the mean of its divisors is an integer number (100163195265000).

Almost surely, 2^{400611663154007} is an apocalyptic number.

400611663154007 is a deficient number, since it is larger than the sum of its proper divisors (41117905993).

400611663154007 is an equidigital number, since it uses as much as digits as its factorization.

400611663154007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41117905992.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 400611663154007 in words is "four hundred trillion, six hundred eleven billion, six hundred sixty-three million, one hundred fifty-four thousand, seven".