40385720951 has 2 divisors, whose sum is σ = 40385720952. Its totient is φ = 40385720950.

The previous prime is 40385720833. The next prime is 40385720971. The reversal of 40385720951 is 15902758304.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40385720951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40385720971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20192860475 + 20192860476.

It is an arithmetic number, because the mean of its divisors is an integer number (20192860476).

Almost surely, 2^40385720951 is an apocalyptic number.

40385720951 is a deficient number, since it is larger than the sum of its proper divisors (1).

40385720951 is an equidigital number, since it uses as much as digits as its factorization.

40385720951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 40385720951 in words is "forty billion, three hundred eighty-five million, seven hundred twenty thousand, nine hundred fifty-one".