40306921425 has 72 divisors (see below), whose sum is σ = 72607123680. Its totient is φ = 21374496000.

The previous prime is 40306921349. The next prime is 40306921427. The reversal of 40306921425 is 52412960304.

It is a happy number.

It is not a de Polignac number, because 40306921425 - 2⁸ = 40306921169 is a prime.

It is a super-2 number, since 2×40306921425² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40306921425.

It is not an unprimeable number, because it can be changed into a prime (40306921427) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 46922646 + ... + 46923504.

Almost surely, 2^40306921425 is an apocalyptic number.

40306921425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40306921425 is a deficient number, since it is larger than the sum of its proper divisors (32300202255).

40306921425 is a wasteful number, since it uses less digits than its factorization.

40306921425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823 (or 1815 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 40306921425 in words is "forty billion, three hundred six million, nine hundred twenty-one thousand, four hundred twenty-five".