1387501390025 has 24 divisors (see below), whose sum is σ = 1839744474264. Its totient is φ = 1034363264000.

The previous prime is 1387501390021. The next prime is 1387501390043. The reversal of 1387501390025 is 5200931057831.

It can be written as a sum of positive squares in 12 ways, for example, as 82325381776 + 1305176008249 = 286924^2 + 1142443^2 .

It is not a de Polignac number, because 1387501390025 - 2² = 1387501390021 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1387501390021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16119002 + ... + 16204851.

It is an arithmetic number, because the mean of its divisors is an integer number (76656019761).

Almost surely, 2^{1387501390025} is an apocalyptic number.

It is an amenable number.

1387501390025 is a deficient number, since it is larger than the sum of its proper divisors (452243084239).

1387501390025 is a wasteful number, since it uses less digits than its factorization.

1387501390025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32323981 (or 32323976 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 1387501390025 in words is "one trillion, three hundred eighty-seven billion, five hundred one million, three hundred ninety thousand, twenty-five".