61690154 has 8 divisors (see below), whose sum is σ = 94052388. Its totient is φ = 30339360.

The previous prime is 61690151. The next prime is 61690171. The reversal of 61690154 is 45109616.

61690154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51912025 + 9778129 = 7205^2 + 3127^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 61690154.

It is not an unprimeable number, because it can be changed into a prime (61690151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252707 + ... + 252950.

Almost surely, 2^61690154 is an apocalyptic number.

61690154 is a deficient number, since it is larger than the sum of its proper divisors (32362234).

61690154 is a wasteful number, since it uses less digits than its factorization.

61690154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505720.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 61690154 is about 7854.3079898868. The cubic root of 61690154 is about 395.1287386810.

The spelling of 61690154 in words is "sixty-one million, six hundred ninety thousand, one hundred fifty-four".