40102020455 has 16 divisors (see below), whose sum is σ = 55001643840. Its totient is φ = 27496234752.

The previous prime is 40102020437. The next prime is 40102020457. The reversal of 40102020455 is 55402020104.

It is a happy number.

It is not a de Polignac number, because 40102020455 - 2⁸ = 40102020199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40102020455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40102020457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451241 + ... + 532749.

It is an arithmetic number, because the mean of its divisors is an integer number (3437602740).

Almost surely, 2^40102020455 is an apocalyptic number.

40102020455 is a deficient number, since it is larger than the sum of its proper divisors (14899623385).

40102020455 is a wasteful number, since it uses less digits than its factorization.

40102020455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95578.

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 40102020455 its reverse (55402020104), we get a palindrome (95504040559).

The spelling of 40102020455 in words is "forty billion, one hundred two million, twenty thousand, four hundred fifty-five".