1455132778 has 16 divisors (see below), whose sum is σ = 2402975520. Its totient is φ = 655354800.

The previous prime is 1455132769. The next prime is 1455132787. The reversal of 1455132778 is 8772315541.

It is an interprime number because it is at equal distance from previous prime (1455132769) and next prime (1455132787).

It is a super-2 number, since 2×1455132778² = 4234822803219994568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301008 + ... + 305803.

It is an arithmetic number, because the mean of its divisors is an integer number (150185970).

Almost surely, 2^1455132778 is an apocalyptic number.

1455132778 is a deficient number, since it is larger than the sum of its proper divisors (947842742).

1455132778 is a wasteful number, since it uses less digits than its factorization.

1455132778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606933.

The product of its digits is 235200, while the sum is 43.

The square root of 1455132778 is about 38146.2026681556. The cubic root of 1455132778 is about 1133.1851498492.

The spelling of 1455132778 in words is "one billion, four hundred fifty-five million, one hundred thirty-two thousand, seven hundred seventy-eight".