1377463725 has 84 divisors (see below), whose sum is σ = 2794127712. Its totient is φ = 667764000.

The previous prime is 1377463723. The next prime is 1377463741. The reversal of 1377463725 is 5273647731.

1377463725 is a `hidden beast` number, since 1 + 3 + 7 + 7 + 4 + 637 + 2 + 5 = 666.

It is not a de Polignac number, because 1377463725 - 2¹ = 1377463723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377463723) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 197040 + ... + 203910.

Almost surely, 2^1377463725 is an apocalyptic number.

1377463725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1377463725 is an abundant number, since it is smaller than the sum of its proper divisors (1416663987).

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

1377463725 is an equidigital number, since it uses as much as digits as its factorization.

1377463725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910 (or 6890 counting only the distinct ones).

The product of its digits is 740880, while the sum is 45.

The square root of 1377463725 is about 37114.1984286338. The cubic root of 1377463725 is about 1112.6538035894.

The spelling of 1377463725 in words is "one billion, three hundred seventy-seven million, four hundred sixty-three thousand, seven hundred twenty-five".