40372741661 has 4 divisors (see below), whose sum is σ = 46140276192. Its totient is φ = 34605207132.

The previous prime is 40372741649. The next prime is 40372741687. The reversal of 40372741661 is 16614727304.

40372741661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40372741661 - 2²⁶ = 40305632797 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 (40372741631) 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, 2883767255 + ... + 2883767268.

It is an arithmetic number, because the mean of its divisors is an integer number (11535069048).

Almost surely, 2^40372741661 is an apocalyptic number.

It is an amenable number.

40372741661 is a deficient number, since it is larger than the sum of its proper divisors (5767534531).

40372741661 is an equidigital number, since it uses as much as digits as its factorization.

40372741661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5767534530.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 40372741661 in words is "forty billion, three hundred seventy-two million, seven hundred forty-one thousand, six hundred sixty-one".