40402155247 has 2 divisors, whose sum is σ = 40402155248. Its totient is φ = 40402155246.

The previous prime is 40402155197. The next prime is 40402155271. The reversal of 40402155247 is 74255120404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40402155247 - 2⁷ = 40402155119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40402155947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20201077623 + 20201077624.

It is an arithmetic number, because the mean of its divisors is an integer number (20201077624).

Almost surely, 2^40402155247 is an apocalyptic number.

40402155247 is a deficient number, since it is larger than the sum of its proper divisors (1).

40402155247 is an equidigital number, since it uses as much as digits as its factorization.

40402155247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44800, while the sum is 34.

The spelling of 40402155247 in words is "forty billion, four hundred two million, one hundred fifty-five thousand, two hundred forty-seven".