1945148780 has 24 divisors (see below), whose sum is σ = 4111870560. Its totient is φ = 772905600.

The previous prime is 1945148771. The next prime is 1945148791. The reversal of 1945148780 is 878415491.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319025 + ... + 325064.

It is an arithmetic number, because the mean of its divisors is an integer number (171327940).

Almost surely, 2^1945148780 is an apocalyptic number.

1945148780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1945148780 is an abundant number, since it is smaller than the sum of its proper divisors (2166721780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1945148780 is a wasteful number, since it uses less digits than its factorization.

1945148780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644249 (or 644247 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The square root of 1945148780 is about 44103.8408758240. The cubic root of 1945148780 is about 1248.2960847937.

The spelling of 1945148780 in words is "one billion, nine hundred forty-five million, one hundred forty-eight thousand, seven hundred eighty".