40723870521601 has 4 divisors (see below), whose sum is σ = 41239362553600. Its totient is φ = 40208378489604.

The previous prime is 40723870521599. The next prime is 40723870521661. The reversal of 40723870521601 is 10612507832704.

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 40723870521601 - 2¹ = 40723870521599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40723870521661) 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, 257746015881 + ... + 257746016038.

It is an arithmetic number, because the mean of its divisors is an integer number (10309840638400).

Almost surely, 2^{40723870521601} is an apocalyptic number.

It is an amenable number.

40723870521601 is a deficient number, since it is larger than the sum of its proper divisors (515492031999).

40723870521601 is an equidigital number, since it uses as much as digits as its factorization.

40723870521601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515492031998.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 40723870521601 in words is "forty trillion, seven hundred twenty-three billion, eight hundred seventy million, five hundred twenty-one thousand, six hundred one".