45781977 has 4 divisors (see below), whose sum is σ = 61042640. Its totient is φ = 30521316.

The previous prime is 45781921. The next prime is 45781991. The reversal of 45781977 is 77918754.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 45781977 - 2¹⁰ = 45780953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45781997) 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, 7630327 + ... + 7630332.

It is an arithmetic number, because the mean of its divisors is an integer number (15260660).

Almost surely, 2^45781977 is an apocalyptic number.

It is an amenable number.

45781977 is a deficient number, since it is larger than the sum of its proper divisors (15260663).

45781977 is a wasteful number, since it uses less digits than its factorization.

45781977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15260662.

The product of its digits is 493920, while the sum is 48.

The square root of 45781977 is about 6766.2380241904. The cubic root of 45781977 is about 357.7378129820.

It can be divided in two parts, 4578 and 1977, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 45781977 in words is "forty-five million, seven hundred eighty-one thousand, nine hundred seventy-seven".