1264161738 has 16 divisors (see below), whose sum is σ = 2889512640. Its totient is φ = 361189056.

The previous prime is 1264161727. The next prime is 1264161749. The reversal of 1264161738 is 8371614621.

It is an interprime number because it is at equal distance from previous prime (1264161727) and next prime (1264161749).

It is a junction number, because it is equal to n+sod(n) for n = 1264161696 and 1264161705.

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, 15049503 + ... + 15049586.

It is an arithmetic number, because the mean of its divisors is an integer number (180594540).

Almost surely, 2^1264161738 is an apocalyptic number.

1264161738 is an abundant number, since it is smaller than the sum of its proper divisors (1625350902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1264161738 is a wasteful number, since it uses less digits than its factorization.

1264161738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30099101.

The product of its digits is 48384, while the sum is 39.

The square root of 1264161738 is about 35555.0522148400. The cubic root of 1264161738 is about 1081.2701500115.

The spelling of 1264161738 in words is "one billion, two hundred sixty-four million, one hundred sixty-one thousand, seven hundred thirty-eight".