1618401970 has 16 divisors (see below), whose sum is σ = 2953030680. Its totient is φ = 638492544.

The previous prime is 1618401959. The next prime is 1618402003. The reversal of 1618401970 is 791048161.

It can be written as a sum of positive squares in 4 ways, for example, as 1266576921 + 351825049 = 35589^2 + 18757^2 .

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, 1107765 + ... + 1109224.

Almost surely, 2^1618401970 is an apocalyptic number.

1618401970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1618401970 is a deficient number, since it is larger than the sum of its proper divisors (1334628710).

1618401970 is a wasteful number, since it uses less digits than its factorization.

1618401970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217069.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1618401970 is about 40229.3670096858. The cubic root of 1618401970 is about 1174.0739877740.

The spelling of 1618401970 in words is "one billion, six hundred eighteen million, four hundred one thousand, nine hundred seventy".