1630778375 has 16 divisors (see below), whose sum is σ = 2043359136. Its totient is φ = 1299400000.

The previous prime is 1630778351. The next prime is 1630778389. The reversal of 1630778375 is 5738770361.

It is a happy number.

It is not a de Polignac number, because 1630778375 - 2¹² = 1630774279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5387 + ... + 57363.

It is an arithmetic number, because the mean of its divisors is an integer number (127709946).

Almost surely, 2^1630778375 is an apocalyptic number.

1630778375 is a deficient number, since it is larger than the sum of its proper divisors (412580761).

1630778375 is an equidigital number, since it uses as much as digits as its factorization.

1630778375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52243 (or 52233 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 47.

The square root of 1630778375 is about 40382.8970605131. The cubic root of 1630778375 is about 1177.0592229031.

The spelling of 1630778375 in words is "one billion, six hundred thirty million, seven hundred seventy-eight thousand, three hundred seventy-five".