61401552 has 80 divisors (see below), whose sum is σ = 171631872. Its totient is φ = 18841600.

The previous prime is 61401533. The next prime is 61401577. The reversal of 61401552 is 25510416.

61401552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 37552 + ... + 39152.

Almost surely, 2^61401552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61401552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85815936).

61401552 is an abundant number, since it is smaller than the sum of its proper divisors (110230320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61401552 is a wasteful number, since it uses less digits than its factorization.

61401552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 61401552 is about 7835.9142414909. The cubic root of 61401552 is about 394.5116048896.

Adding to 61401552 its reverse (25510416), we get a palindrome (86911968).

The spelling of 61401552 in words is "sixty-one million, four hundred one thousand, five hundred fifty-two".