1397635587072 has 66 divisors (see below), whose sum is σ = 4035642453648. Its totient is φ = 465878525952.

The previous prime is 1397635587067. The next prime is 1397635587077. The reversal of 1397635587072 is 2707855367931.

1397635587072 is a `hidden beast` number, since 1 + 3 + 9 + 7 + 6 + 3 + 558 + 7 + 0 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (1397635587067) and next prime (1397635587077).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397635587077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75817368 + ... + 75835799.

Almost surely, 2^{1397635587072} is an apocalyptic number.

1397635587072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1397635587072 is an abundant number, since it is smaller than the sum of its proper divisors (2638006866576).

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

1397635587072 is a wasteful number, since it uses less digits than its factorization.

1397635587072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151653193 (or 151653172 counting only the distinct ones).

The product of its (nonzero) digits is 66679200, while the sum is 63.

The spelling of 1397635587072 in words is "one trillion, three hundred ninety-seven billion, six hundred thirty-five million, five hundred eighty-seven thousand, seventy-two".