7940155645 has 8 divisors (see below), whose sum is σ = 9529749504. Its totient is φ = 6351082704.

The previous prime is 7940155633. The next prime is 7940155649. The reversal of 7940155645 is 5465510497.

7940155645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7940155645 - 2¹⁵ = 7940122877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7940155595 and 7940155604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7940155649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95869 + ... + 158338.

It is an arithmetic number, because the mean of its divisors is an integer number (1191218688).

Almost surely, 2^7940155645 is an apocalyptic number.

It is an amenable number.

7940155645 is a deficient number, since it is larger than the sum of its proper divisors (1589593859).

7940155645 is a wasteful number, since it uses less digits than its factorization.

7940155645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260459.

The product of its (nonzero) digits is 756000, while the sum is 46.

The square root of 7940155645 is about 89107.5509987790. The cubic root of 7940155645 is about 1995.0004832464. Note that the first 3 decimals are identical.

The spelling of 7940155645 in words is "seven billion, nine hundred forty million, one hundred fifty-five thousand, six hundred forty-five".