29478037155851 has 2 divisors, whose sum is σ = 29478037155852. Its totient is φ = 29478037155850.

The previous prime is 29478037155773. The next prime is 29478037155883. The reversal of 29478037155851 is 15855173087492.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29478037155851 is a prime.

It is a super-2 number, since 2×29478037155851² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29478037115851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14739018577925 + 14739018577926.

It is an arithmetic number, because the mean of its divisors is an integer number (14739018577926).

Almost surely, 2^{29478037155851} is an apocalyptic number.

29478037155851 is a deficient number, since it is larger than the sum of its proper divisors (1).

29478037155851 is an equidigital number, since it uses as much as digits as its factorization.

29478037155851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672000, while the sum is 65.

The spelling of 29478037155851 in words is "twenty-nine trillion, four hundred seventy-eight billion, thirty-seven million, one hundred fifty-five thousand, eight hundred fifty-one".