1156378415506 has 4 divisors (see below), whose sum is σ = 1734567623262. Its totient is φ = 578189207752.

The previous prime is 1156378415503. The next prime is 1156378415531. The reversal of 1156378415506 is 6055148736511.

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

It can be written as a sum of positive squares in only one way, i.e., 890956649025 + 265421766481 = 943905^2 + 515191^2 .

It is a super-2 number, since 2×1156378415506² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1156378415503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289094603875 + ... + 289094603878.

Almost surely, 2^{1156378415506} is an apocalyptic number.

1156378415506 is a deficient number, since it is larger than the sum of its proper divisors (578189207756).

1156378415506 is an equidigital number, since it uses as much as digits as its factorization.

1156378415506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578189207755.

The product of its (nonzero) digits is 3024000, while the sum is 52.

The spelling of 1156378415506 in words is "one trillion, one hundred fifty-six billion, three hundred seventy-eight million, four hundred fifteen thousand, five hundred six".