40212070691 has 32 divisors (see below), whose sum is σ = 46465876800. Its totient is φ = 34469867520.

The previous prime is 40212070667. The next prime is 40212070699. The reversal of 40212070691 is 19607021204.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40212070691 - 2²⁶ = 40144961827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40212070699) 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, 10639040 + ... + 10642818.

It is an arithmetic number, because the mean of its divisors is an integer number (1452058650).

Almost surely, 2^40212070691 is an apocalyptic number.

40212070691 is a deficient number, since it is larger than the sum of its proper divisors (6253806109).

40212070691 is a wasteful number, since it uses less digits than its factorization.

40212070691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4439.

The product of its (nonzero) digits is 6048, while the sum is 32.

Adding to 40212070691 its reverse (19607021204), we get a palindrome (59819091895).

The spelling of 40212070691 in words is "forty billion, two hundred twelve million, seventy thousand, six hundred ninety-one".