61001421372 has 36 divisors (see below), whose sum is σ = 156055852680. Its totient is φ = 20088820512.

The previous prime is 61001421359. The next prime is 61001421407. The reversal of 61001421372 is 27312410016.

61001421372 is a `hidden beast` number, since 610 + 0 + 1 + 42 + 1 + 3 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10204747 + ... + 10210722.

Almost surely, 2^61001421372 is an apocalyptic number.

It is an amenable number.

61001421372 is an abundant number, since it is smaller than the sum of its proper divisors (95054431308).

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

61001421372 is a wasteful number, since it uses less digits than its factorization.

61001421372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20415562 (or 20415557 counting only the distinct ones).

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

Adding to 61001421372 its reverse (27312410016), we get a palindrome (88313831388).

The spelling of 61001421372 in words is "sixty-one billion, one million, four hundred twenty-one thousand, three hundred seventy-two".