1401397715507 has 4 divisors (see below), whose sum is σ = 1401409766736. Its totient is φ = 1401385664280.

The previous prime is 1401397715429. The next prime is 1401397715579. The reversal of 1401397715507 is 7055177931041.

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

It is a cyclic number.

It is not a de Polignac number, because 1401397715507 - 2²⁸ = 1401129280051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401397718507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5849468 + ... + 6084329.

It is an arithmetic number, because the mean of its divisors is an integer number (350352441684).

Almost surely, 2^{1401397715507} is an apocalyptic number.

1401397715507 is a deficient number, since it is larger than the sum of its proper divisors (12051229).

1401397715507 is a wasteful number, since it uses less digits than its factorization.

1401397715507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12051228.

The product of its (nonzero) digits is 926100, while the sum is 50.

The spelling of 1401397715507 in words is "one trillion, four hundred one billion, three hundred ninety-seven million, seven hundred fifteen thousand, five hundred seven".