1264061631 has 8 divisors (see below), whose sum is σ = 1926189184. Its totient is φ = 722320920.

The previous prime is 1264061627. The next prime is 1264061633. The reversal of 1264061631 is 1361604621.

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

It is not a de Polignac number, because 1264061631 - 2² = 1264061627 is a prime.

It is a super-2 number, since 2×1264061631² = 3195703613932760322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264061633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30096685 + ... + 30096726.

It is an arithmetic number, because the mean of its divisors is an integer number (240773648).

Almost surely, 2^1264061631 is an apocalyptic number.

1264061631 is a deficient number, since it is larger than the sum of its proper divisors (662127553).

1264061631 is an equidigital number, since it uses as much as digits as its factorization.

1264061631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60193421.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1264061631 is about 35553.6444123524. The cubic root of 1264061631 is about 1081.2416078915.

The spelling of 1264061631 in words is "one billion, two hundred sixty-four million, sixty-one thousand, six hundred thirty-one".