72461649 has 16 divisors (see below), whose sum is σ = 109524800. Its totient is φ = 42244416.

The previous prime is 72461647. The next prime is 72461681. The reversal of 72461649 is 94616427.

It is a happy number.

It is not a de Polignac number, because 72461649 - 2¹ = 72461647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72461647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48154 + ... + 49635.

It is an arithmetic number, because the mean of its divisors is an integer number (6845300).

Almost surely, 2^72461649 is an apocalyptic number.

It is an amenable number.

72461649 is a deficient number, since it is larger than the sum of its proper divisors (37063151).

72461649 is a wasteful number, since it uses less digits than its factorization.

72461649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97824.

The product of its digits is 72576, while the sum is 39.

The square root of 72461649 is about 8512.4408367988. The cubic root of 72461649 is about 416.9040086372.

The spelling of 72461649 in words is "seventy-two million, four hundred sixty-one thousand, six hundred forty-nine".