61081235954 has 4 divisors (see below), whose sum is σ = 91621853934. Its totient is φ = 30540617976.

The previous prime is 61081235927. The next prime is 61081235959. The reversal of 61081235954 is 45953218016.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30882790225 + 30198445729 = 175735^2 + 173777^2 .

It is not an unprimeable number, because it can be changed into a prime (61081235959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15270308987 + ... + 15270308990.

Almost surely, 2^61081235954 is an apocalyptic number.

61081235954 is a deficient number, since it is larger than the sum of its proper divisors (30540617980).

61081235954 is a wasteful number, since it uses less digits than its factorization.

61081235954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30540617979.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 61081235954 in words is "sixty-one billion, eighty-one million, two hundred thirty-five thousand, nine hundred fifty-four".