401921597747 has 4 divisors (see below), whose sum is σ = 401925611736. Its totient is φ = 401917583760.

The previous prime is 401921597741. The next prime is 401921597783. The reversal of 401921597747 is 747795129104.

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

It is a cyclic number.

It is not a de Polignac number, because 401921597747 - 2¹⁰ = 401921596723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401921597692 and 401921597701.

It is not an unprimeable number, because it can be changed into a prime (401921597741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1852853 + ... + 2058374.

It is an arithmetic number, because the mean of its divisors is an integer number (100481402934).

Almost surely, 2^401921597747 is an apocalyptic number.

401921597747 is a deficient number, since it is larger than the sum of its proper divisors (4013989).

401921597747 is a wasteful number, since it uses less digits than its factorization.

401921597747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013988.

The product of its (nonzero) digits is 4445280, while the sum is 56.

The spelling of 401921597747 in words is "four hundred one billion, nine hundred twenty-one million, five hundred ninety-seven thousand, seven hundred forty-seven".