40621791854 has 16 divisors (see below), whose sum is σ = 70778954976. Its totient is φ = 17123940000.

The previous prime is 40621791853. The next prime is 40621791871. The reversal of 40621791854 is 45819712604.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40621791799 and 40621791808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40621791853) 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, 23782397 + ... + 23784104.

It is an arithmetic number, because the mean of its divisors is an integer number (4423684686).

Almost surely, 2^40621791854 is an apocalyptic number.

40621791854 is a deficient number, since it is larger than the sum of its proper divisors (30157163122).

40621791854 is a wasteful number, since it uses less digits than its factorization.

40621791854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47566571.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 40621791854 in words is "forty billion, six hundred twenty-one million, seven hundred ninety-one thousand, eight hundred fifty-four".