1377645450 has 48 divisors (see below), whose sum is σ = 3459838080. Its totient is φ = 362718720.

The previous prime is 1377645449. The next prime is 1377645461. The reversal of 1377645450 is 545467731.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46279 + ... + 69978.

It is an arithmetic number, because the mean of its divisors is an integer number (72079960).

Almost surely, 2^1377645450 is an apocalyptic number.

1377645450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1377645450 is an abundant number, since it is smaller than the sum of its proper divisors (2082192630).

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

1377645450 is a wasteful number, since it uses less digits than its factorization.

1377645450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116351 (or 116346 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 1377645450 is about 37116.6465349444. The cubic root of 1377645450 is about 1112.7027312230.

The spelling of 1377645450 in words is "one billion, three hundred seventy-seven million, six hundred forty-five thousand, four hundred fifty".