1377643245 has 64 divisors (see below), whose sum is σ = 2472864768. Its totient is φ = 649152000.

The previous prime is 1377643243. The next prime is 1377643283. The reversal of 1377643245 is 5423467731.

It is not a de Polignac number, because 1377643245 - 2¹ = 1377643243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377643197 and 1377643206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377643243) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1993350 + ... + 1994040.

It is an arithmetic number, because the mean of its divisors is an integer number (38638512).

Almost surely, 2^1377643245 is an apocalyptic number.

1377643245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1377643245 is a deficient number, since it is larger than the sum of its proper divisors (1095221523).

1377643245 is a wasteful number, since it uses less digits than its factorization.

1377643245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034.

The product of its digits is 423360, while the sum is 42.

The square root of 1377643245 is about 37116.6168312792. The cubic root of 1377643245 is about 1112.7021375746.

The spelling of 1377643245 in words is "one billion, three hundred seventy-seven million, six hundred forty-three thousand, two hundred forty-five".