61672401 has 16 divisors (see below), whose sum is σ = 104419200. Its totient is φ = 35241264.

The previous prime is 61672399. The next prime is 61672409. The reversal of 61672401 is 10427616.

61672401 is a `hidden beast` number, since 616 + 7 + 2 + 40 + 1 = 666.

It is not a de Polignac number, because 61672401 - 2¹ = 61672399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61672409) 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, 162966 + ... + 163343.

It is an arithmetic number, because the mean of its divisors is an integer number (6526200).

Almost surely, 2^61672401 is an apocalyptic number.

It is an amenable number.

61672401 is a deficient number, since it is larger than the sum of its proper divisors (42746799).

61672401 is a wasteful number, since it uses less digits than its factorization.

61672401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326325 (or 326319 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 61672401 is about 7853.1777644467. The cubic root of 61672401 is about 395.0908320727.

The spelling of 61672401 in words is "sixty-one million, six hundred seventy-two thousand, four hundred one".