45520257781 has 8 divisors (see below), whose sum is σ = 46496436480. Its totient is φ = 44544398448.

The previous prime is 45520257767. The next prime is 45520257793. The reversal of 45520257781 is 18775202554.

It is a happy number.

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 45520257781 - 2⁹ = 45520257269 is a prime.

It is a super-2 number, since 2×45520257781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45520257751) 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, 220240 + ... + 373558.

It is an arithmetic number, because the mean of its divisors is an integer number (5812054560).

Almost surely, 2^45520257781 is an apocalyptic number.

It is an amenable number.

45520257781 is a deficient number, since it is larger than the sum of its proper divisors (976178699).

45520257781 is a wasteful number, since it uses less digits than its factorization.

45520257781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159683.

The product of its (nonzero) digits is 784000, while the sum is 46.

The spelling of 45520257781 in words is "forty-five billion, five hundred twenty million, two hundred fifty-seven thousand, seven hundred eighty-one".