42745621737 has 24 divisors (see below), whose sum is σ = 70532088384. Its totient is φ = 22547139264.

The previous prime is 42745621727. The next prime is 42745621741. The reversal of 42745621737 is 73712654724.

It is not a de Polignac number, because 42745621737 - 2⁶ = 42745621673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42745621727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6018658 + ... + 6025755.

It is an arithmetic number, because the mean of its divisors is an integer number (2938837016).

Almost surely, 2^42745621737 is an apocalyptic number.

It is an amenable number.

42745621737 is a deficient number, since it is larger than the sum of its proper divisors (27786466647).

42745621737 is a wasteful number, since it uses less digits than its factorization.

42745621737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12044449 (or 12044436 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 48.

The spelling of 42745621737 in words is "forty-two billion, seven hundred forty-five million, six hundred twenty-one thousand, seven hundred thirty-seven".