45907781 has 8 divisors (see below), whose sum is σ = 48390720. Its totient is φ = 43431552.

The previous prime is 45907777. The next prime is 45907801. The reversal of 45907781 is 18770954.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45907781 - 2² = 45907777 is a prime.

It is a super-2 number, since 2×45907781² = 4215048712687922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45907711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19061 + ... + 21333.

It is an arithmetic number, because the mean of its divisors is an integer number (6048840).

Almost surely, 2^45907781 is an apocalyptic number.

It is an amenable number.

45907781 is a deficient number, since it is larger than the sum of its proper divisors (2482939).

45907781 is a wasteful number, since it uses less digits than its factorization.

45907781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 45907781 is about 6775.5280974991. The cubic root of 45907781 is about 358.0651884453.

The spelling of 45907781 in words is "forty-five million, nine hundred seven thousand, seven hundred eighty-one".