40645761 has 32 divisors (see below), whose sum is σ = 61592832. Its totient is φ = 23654400.

The previous prime is 40645747. The next prime is 40645777. The reversal of 40645761 is 16754604.

It is not a de Polignac number, because 40645761 - 2⁵ = 40645729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40645711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101161 + ... + 101561.

It is an arithmetic number, because the mean of its divisors is an integer number (1924776).

Almost surely, 2^40645761 is an apocalyptic number.

It is an amenable number.

40645761 is a deficient number, since it is larger than the sum of its proper divisors (20947071).

40645761 is a wasteful number, since it uses less digits than its factorization.

40645761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 40645761 is about 6375.4028108034. The cubic root of 40645761 is about 343.8257663954.

The spelling of 40645761 in words is "forty million, six hundred forty-five thousand, seven hundred sixty-one".