7621406245715 has 4 divisors (see below), whose sum is σ = 9145687494864. Its totient is φ = 6097124996568.

The previous prime is 7621406245711. The next prime is 7621406245721. The reversal of 7621406245715 is 5175426041267.

It is a happy number.

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 7621406245715 - 2² = 7621406245711 is a prime.

It is a super-2 number, since 2×7621406245715² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7621406245711) 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, 762140624567 + ... + 762140624576.

It is an arithmetic number, because the mean of its divisors is an integer number (2286421873716).

Almost surely, 2^{7621406245715} is an apocalyptic number.

7621406245715 is a deficient number, since it is larger than the sum of its proper divisors (1524281249149).

7621406245715 is a wasteful number, since it uses less digits than its factorization.

7621406245715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524281249148.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 7621406245715 in words is "seven trillion, six hundred twenty-one billion, four hundred six million, two hundred forty-five thousand, seven hundred fifteen".