429944747661 has 32 divisors (see below), whose sum is σ = 748310989440. Its totient is φ = 240528528000.

The previous prime is 429944747657. The next prime is 429944747681. The reversal of 429944747661 is 166747449924.

429944747661 is a `hidden beast` number, since 4 + 2 + 9 + 94 + 474 + 76 + 6 + 1 = 666.

It is not a de Polignac number, because 429944747661 - 2² = 429944747657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (429944747641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55674040 + ... + 55681761.

It is an arithmetic number, because the mean of its divisors is an integer number (23384718420).

Almost surely, 2^429944747661 is an apocalyptic number.

It is an amenable number.

429944747661 is a deficient number, since it is larger than the sum of its proper divisors (318366241779).

429944747661 is a wasteful number, since it uses less digits than its factorization.

429944747661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111355834 (or 111355828 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 63.

The spelling of 429944747661 in words is "four hundred twenty-nine billion, nine hundred forty-four million, seven hundred forty-seven thousand, six hundred sixty-one".