29631470139649 has 12 divisors (see below), whose sum is σ = 34579386635844. Its totient is φ = 25317257906304.

The previous prime is 29631470139589. The next prime is 29631470139653. The reversal of 29631470139649 is 94693107413692.

It can be written as a sum of positive squares in 2 ways, for example, as 1449599144049 + 28181870995600 = 1203993^2 + 5308660^2 .

It is not a de Polignac number, because 29631470139649 - 2¹³ = 29631470131457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29631470139749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 965997252 + ... + 966027925.

It is an arithmetic number, because the mean of its divisors is an integer number (2881615552987).

Almost surely, 2^{29631470139649} is an apocalyptic number.

It is an amenable number.

29631470139649 is a deficient number, since it is larger than the sum of its proper divisors (4947916496195).

29631470139649 is a wasteful number, since it uses less digits than its factorization.

29631470139649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932025504 (or 1932025497 counting only the distinct ones).

The product of its (nonzero) digits is 52907904, while the sum is 64.

The spelling of 29631470139649 in words is "twenty-nine trillion, six hundred thirty-one billion, four hundred seventy million, one hundred thirty-nine thousand, six hundred forty-nine".