29145655440 has 640 divisors, whose sum is σ = 118021017600. Its totient is φ = 6531932160.

The previous prime is 29145655439. The next prime is 29145655471. The reversal of 29145655440 is 4455654192.

29145655440 is a `hidden beast` number, since 2 + 9 + 1 + 4 + 56 + 554 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 23830669 + ... + 23831891.

It is an arithmetic number, because the mean of its divisors is an integer number (184407840).

Almost surely, 2^29145655440 is an apocalyptic number.

29145655440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29145655440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59010508800).

29145655440 is an abundant number, since it is smaller than the sum of its proper divisors (88875362160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29145655440 is a wasteful number, since it uses less digits than its factorization.

29145655440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 29145655440 in words is "twenty-nine billion, one hundred forty-five million, six hundred fifty-five thousand, four hundred forty".