60640649 has 8 divisors (see below), whose sum is σ = 65261448. Its totient is φ = 56136960.

The previous prime is 60640633. The next prime is 60640651. The reversal of 60640649 is 94604606.

It can be written as a sum of positive squares in 4 ways, for example, as 8179600 + 52461049 = 2860^2 + 7243^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 60640649 - 2⁴ = 60640633 is a prime.

It is a super-2 number, since 2×60640649² = 7354576622282402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (60640549) 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, 28202 + ... + 30275.

It is an arithmetic number, because the mean of its divisors is an integer number (8157681).

Almost surely, 2^60640649 is an apocalyptic number.

It is an amenable number.

60640649 is a deficient number, since it is larger than the sum of its proper divisors (4620799).

60640649 is a wasteful number, since it uses less digits than its factorization.

60640649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58555.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 60640649 is about 7787.2106045747. The cubic root of 60640649 is about 392.8751985845.

The spelling of 60640649 in words is "sixty million, six hundred forty thousand, six hundred forty-nine".