1457161978 has 8 divisors (see below), whose sum is σ = 2196727200. Its totient is φ = 724919580.

The previous prime is 1457161969. The next prime is 1457161997. The reversal of 1457161978 is 8791617541.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1830208 + ... + 1831003.

It is an arithmetic number, because the mean of its divisors is an integer number (274590900).

Almost surely, 2^1457161978 is an apocalyptic number.

1457161978 is a deficient number, since it is larger than the sum of its proper divisors (739565222).

1457161978 is a wasteful number, since it uses less digits than its factorization.

1457161978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661412.

The product of its digits is 423360, while the sum is 49.

The square root of 1457161978 is about 38172.7910690324. The cubic root of 1457161978 is about 1133.7116519191.

The spelling of 1457161978 in words is "one billion, four hundred fifty-seven million, one hundred sixty-one thousand, nine hundred seventy-eight".