29745151957 has 4 divisors (see below), whose sum is σ = 31494866796. Its totient is φ = 27995437120.

The previous prime is 29745151921. The next prime is 29745151967. The reversal of 29745151957 is 75915154792.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19053385156 + 10691766801 = 138034^2 + 103401^2 .

It is a cyclic number.

It is not a de Polignac number, because 29745151957 - 2⁷ = 29745151829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29745151898 and 29745151907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29745151967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874857394 + ... + 874857427.

It is an arithmetic number, because the mean of its divisors is an integer number (7873716699).

Almost surely, 2^29745151957 is an apocalyptic number.

It is an amenable number.

29745151957 is a deficient number, since it is larger than the sum of its proper divisors (1749714839).

29745151957 is a wasteful number, since it uses less digits than its factorization.

29745151957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749714838.

The product of its digits is 3969000, while the sum is 55.

The spelling of 29745151957 in words is "twenty-nine billion, seven hundred forty-five million, one hundred fifty-one thousand, nine hundred fifty-seven".