40651688402 has 8 divisors (see below), whose sum is σ = 65668112076. Its totient is φ = 18762317712.

The previous prime is 40651688401. The next prime is 40651688419. The reversal of 40651688402 is 20488615604.

It is a happy number.

40651688402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 38345864041 + 2305824361 = 195821^2 + 48019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40651688401) 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, 781763213 + ... + 781763264.

Almost surely, 2^40651688402 is an apocalyptic number.

40651688402 is a deficient number, since it is larger than the sum of its proper divisors (25016423674).

40651688402 is a wasteful number, since it uses less digits than its factorization.

40651688402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563526492.

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 40651688402 in words is "forty billion, six hundred fifty-one million, six hundred eighty-eight thousand, four hundred two".