1377608198421 has 96 divisors (see below), whose sum is σ = 2401980715008. Its totient is φ = 694803795840.

The previous prime is 1377608198353. The next prime is 1377608198489. The reversal of 1377608198421 is 1248918067731.

It is an interprime number because it is at equal distance from previous prime (1377608198353) and next prime (1377608198489).

It is not a de Polignac number, because 1377608198421 - 2¹⁰ = 1377608197397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377608198821) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 201784810 + ... + 201791636.

It is an arithmetic number, because the mean of its divisors is an integer number (25020632448).

Almost surely, 2^{1377608198421} is an apocalyptic number.

It is an amenable number.

1377608198421 is a deficient number, since it is larger than the sum of its proper divisors (1024372516587).

1377608198421 is a wasteful number, since it uses less digits than its factorization.

1377608198421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11471 (or 11464 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 1377608198421 in words is "one trillion, three hundred seventy-seven billion, six hundred eight million, one hundred ninety-eight thousand, four hundred twenty-one".