1377553551 has 32 divisors (see below), whose sum is σ = 2034160128. Its totient is φ = 822282240.

The previous prime is 1377553531. The next prime is 1377553553. The reversal of 1377553551 is 1553557731.

It is not a de Polignac number, because 1377553551 - 2⁶ = 1377553487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377553553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 744910 + ... + 746756.

It is an arithmetic number, because the mean of its divisors is an integer number (63567504).

Almost surely, 2^1377553551 is an apocalyptic number.

1377553551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1377553551 is a deficient number, since it is larger than the sum of its proper divisors (656606577).

1377553551 is a wasteful number, since it uses less digits than its factorization.

1377553551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191.

The product of its digits is 275625, while the sum is 42.

The square root of 1377553551 is about 37115.4085387727. The cubic root of 1377553551 is about 1112.6779888768.

The spelling of 1377553551 in words is "one billion, three hundred seventy-seven million, five hundred fifty-three thousand, five hundred fifty-one".