240491372477 has 2 divisors, whose sum is σ = 240491372478. Its totient is φ = 240491372476.

The previous prime is 240491372447. The next prime is 240491372519. The reversal of 240491372477 is 774273194042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183093275236 + 57398097241 = 427894^2 + 239579^2 .

It is a cyclic number.

It is not a de Polignac number, because 240491372477 - 2⁸ = 240491372221 is a prime.

It is a super-2 number, since 2×240491372477² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240491372437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120245686238 + 120245686239.

It is an arithmetic number, because the mean of its divisors is an integer number (120245686239).

Almost surely, 2^240491372477 is an apocalyptic number.

It is an amenable number.

240491372477 is a deficient number, since it is larger than the sum of its proper divisors (1).

240491372477 is an equidigital number, since it uses as much as digits as its factorization.

240491372477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2370816, while the sum is 50.

The spelling of 240491372477 in words is "two hundred forty billion, four hundred ninety-one million, three hundred seventy-two thousand, four hundred seventy-seven".