40157420651 has 2 divisors, whose sum is σ = 40157420652. Its totient is φ = 40157420650.

The previous prime is 40157420557. The next prime is 40157420747. The reversal of 40157420651 is 15602475104.

40157420651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40157420651 - 2¹⁸ = 40157158507 is a prime.

It is a super-2 number, since 2×40157420651² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40157420351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20078710325 + 20078710326.

It is an arithmetic number, because the mean of its divisors is an integer number (20078710326).

Almost surely, 2^40157420651 is an apocalyptic number.

40157420651 is a deficient number, since it is larger than the sum of its proper divisors (1).

40157420651 is an equidigital number, since it uses as much as digits as its factorization.

40157420651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 35.

Adding to 40157420651 its reverse (15602475104), we get a palindrome (55759895755).

The spelling of 40157420651 in words is "forty billion, one hundred fifty-seven million, four hundred twenty thousand, six hundred fifty-one".