1955149474 has 4 divisors (see below), whose sum is σ = 2932724214. Its totient is φ = 977574736.

The previous prime is 1955149423. The next prime is 1955149501. The reversal of 1955149474 is 4749415591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4749415591 = 953 ⋅4983647.

It can be written as a sum of positive squares in only one way, i.e., 1864080625 + 91068849 = 43175^2 + 9543^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488787367 + ... + 488787370.

Almost surely, 2^1955149474 is an apocalyptic number.

1955149474 is a deficient number, since it is larger than the sum of its proper divisors (977574740).

1955149474 is an equidigital number, since it uses as much as digits as its factorization.

1955149474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977574739.

The product of its digits is 907200, while the sum is 49.

The square root of 1955149474 is about 44217.0722006783. The cubic root of 1955149474 is about 1250.4317386509.

The spelling of 1955149474 in words is "one billion, nine hundred fifty-five million, one hundred forty-nine thousand, four hundred seventy-four".