42405001651 has 2 divisors, whose sum is σ = 42405001652. Its totient is φ = 42405001650.

The previous prime is 42405001631. The next prime is 42405001697. The reversal of 42405001651 is 15610050424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42405001651 - 2⁷ = 42405001523 is a prime.

It is a super-4 number, since 4×42405001651⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is not a weakly prime, because it can be changed into another prime (42405001631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21202500825 + 21202500826.

It is an arithmetic number, because the mean of its divisors is an integer number (21202500826).

Almost surely, 2^42405001651 is an apocalyptic number.

42405001651 is a deficient number, since it is larger than the sum of its proper divisors (1).

42405001651 is an equidigital number, since it uses as much as digits as its factorization.

42405001651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 42405001651 in words is "forty-two billion, four hundred five million, one thousand, six hundred fifty-one".