40155426421 has 8 divisors (see below), whose sum is σ = 43808536800. Its totient is φ = 36502752240.

The previous prime is 40155426401. The next prime is 40155426439. The reversal of 40155426421 is 12462455104.

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

It is a cyclic number.

It is not a de Polignac number, because 40155426421 - 2¹⁹ = 40154902133 is a prime.

It is a super-2 number, since 2×40155426421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40155426401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101050 + ... + 300868.

It is an arithmetic number, because the mean of its divisors is an integer number (5476067100).

Almost surely, 2^40155426421 is an apocalyptic number.

It is an amenable number.

40155426421 is a deficient number, since it is larger than the sum of its proper divisors (3653110379).

40155426421 is a wasteful number, since it uses less digits than its factorization.

40155426421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218099.

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 40155426421 in words is "forty billion, one hundred fifty-five million, four hundred twenty-six thousand, four hundred twenty-one".