401191309537 has 4 divisors (see below), whose sum is σ = 404940761136. Its totient is φ = 397441857940.

The previous prime is 401191309507. The next prime is 401191309573. The reversal of 401191309537 is 735903191104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 401191309537 - 2¹⁹ = 401190785249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401191309493 and 401191309502.

It is not an unprimeable number, because it can be changed into a prime (401191309507) 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, 1874725639 + ... + 1874725852.

It is an arithmetic number, because the mean of its divisors is an integer number (101235190284).

Almost surely, 2^401191309537 is an apocalyptic number.

It is an amenable number.

401191309537 is a deficient number, since it is larger than the sum of its proper divisors (3749451599).

401191309537 is a wasteful number, since it uses less digits than its factorization.

401191309537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3749451598.

The product of its (nonzero) digits is 102060, while the sum is 43.

The spelling of 401191309537 in words is "four hundred one billion, one hundred ninety-one million, three hundred nine thousand, five hundred thirty-seven".