7861340155 has 16 divisors (see below), whose sum is σ = 10272535200. Its totient is φ = 5752615680.

The previous prime is 7861340153. The next prime is 7861340219. The reversal of 7861340155 is 5510431687.

It is a happy number.

It is not a de Polignac number, because 7861340155 - 2¹ = 7861340153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7861340153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1423986 + ... + 1429495.

It is an arithmetic number, because the mean of its divisors is an integer number (642033450).

Almost surely, 2^7861340155 is an apocalyptic number.

7861340155 is a deficient number, since it is larger than the sum of its proper divisors (2411195045).

7861340155 is a wasteful number, since it uses less digits than its factorization.

7861340155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853534.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 7861340155 is about 88664.1988347044. The cubic root of 7861340155 is about 1988.3776036983.

The spelling of 7861340155 in words is "seven billion, eight hundred sixty-one million, three hundred forty thousand, one hundred fifty-five".