29427640647 has 16 divisors (see below), whose sum is σ = 39825297408. Its totient is φ = 19326201120.

The previous prime is 29427640631. The next prime is 29427640663. The reversal of 29427640647 is 74604672492.

It is an interprime number because it is at equal distance from previous prime (29427640631) and next prime (29427640663).

It is not a de Polignac number, because 29427640647 - 2⁴ = 29427640631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29427640647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29427640547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190288 + ... + 308325.

It is an arithmetic number, because the mean of its divisors is an integer number (2489081088).

Almost surely, 2^29427640647 is an apocalyptic number.

29427640647 is a deficient number, since it is larger than the sum of its proper divisors (10397656761).

29427640647 is a wasteful number, since it uses less digits than its factorization.

29427640647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498910.

The product of its (nonzero) digits is 4064256, while the sum is 51.

The spelling of 29427640647 in words is "twenty-nine billion, four hundred twenty-seven million, six hundred forty thousand, six hundred forty-seven".