661202431452 has 72 divisors (see below), whose sum is σ = 1767368383872. Its totient is φ = 208088870400.

The previous prime is 661202431397. The next prime is 661202431453. The reversal of 661202431452 is 254134202166.

661202431452 is a `hidden beast` number, since 6 + 612 + 0 + 2 + 4 + 31 + 4 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661202431453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7179553 + ... + 7271064.

Almost surely, 2^661202431452 is an apocalyptic number.

661202431452 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

661202431452 is an abundant number, since it is smaller than the sum of its proper divisors (1106165952420).

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

661202431452 is a wasteful number, since it uses less digits than its factorization.

661202431452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14450699 (or 14450694 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 661202431452 in words is "six hundred sixty-one billion, two hundred two million, four hundred thirty-one thousand, four hundred fifty-two".