45420778138 has 16 divisors (see below), whose sum is σ = 69831691776. Its totient is φ = 22145306400.

The previous prime is 45420778133. The next prime is 45420778171. The reversal of 45420778138 is 83187702454.

It is a super-2 number, since 2×45420778138² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45420778091 and 45420778100.

It is not an unprimeable number, because it can be changed into a prime (45420778133) 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, 387706 + ... + 491077.

It is an arithmetic number, because the mean of its divisors is an integer number (4364480736).

Almost surely, 2^45420778138 is an apocalyptic number.

45420778138 is a deficient number, since it is larger than the sum of its proper divisors (24410913638).

45420778138 is a wasteful number, since it uses less digits than its factorization.

45420778138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879429.

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 45420778138 in words is "forty-five billion, four hundred twenty million, seven hundred seventy-eight thousand, one hundred thirty-eight".