1373127537506 has 4 divisors (see below), whose sum is σ = 2059691306262. Its totient is φ = 686563768752.

The previous prime is 1373127537443. The next prime is 1373127537563. The reversal of 1373127537506 is 6057357213731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1079228021881 + 293899515625 = 1038859^2 + 542125^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343281884375 + ... + 343281884378.

Almost surely, 2^{1373127537506} is an apocalyptic number.

1373127537506 is a deficient number, since it is larger than the sum of its proper divisors (686563768756).

1373127537506 is an equidigital number, since it uses as much as digits as its factorization.

1373127537506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686563768755.

The product of its (nonzero) digits is 2778300, while the sum is 50.

The spelling of 1373127537506 in words is "one trillion, three hundred seventy-three billion, one hundred twenty-seven million, five hundred thirty-seven thousand, five hundred six".