42156214657 has 2 divisors, whose sum is σ = 42156214658. Its totient is φ = 42156214656.

The previous prime is 42156214651. The next prime is 42156214663. The reversal of 42156214657 is 75641265124.

It is a balanced prime because it is at equal distance from previous prime (42156214651) and next prime (42156214663).

It can be written as a sum of positive squares in only one way, i.e., 42090215281 + 65999376 = 205159^2 + 8124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42156214657 is a prime.

It is not a weakly prime, because it can be changed into another prime (42156214651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21078107328 + 21078107329.

It is an arithmetic number, because the mean of its divisors is an integer number (21078107329).

Almost surely, 2^42156214657 is an apocalyptic number.

It is an amenable number.

42156214657 is a deficient number, since it is larger than the sum of its proper divisors (1).

42156214657 is an equidigital number, since it uses as much as digits as its factorization.

42156214657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 43.

The spelling of 42156214657 in words is "forty-two billion, one hundred fifty-six million, two hundred fourteen thousand, six hundred fifty-seven".